Historical archive. Facts and results reflect the period recorded.
Personal details
| Field | Value |
|---|
| Date of birth | 12 April 1998 (28) |
| Country | Japan |
Career
| Field | Value |
|---|
| Career-high ATP ranking | 72 (week 44 / 2023) |
| Career singles record | 40 18 22 |
| Career doubles record | 1 1 |
Nearby players in the rankings
Recent matches
| Opponent | Result |
|---|
| Tung-Lin Wu | Win |
| Jack Kennedy | Win |
| Braden Shick | Loss |
| August Holmgren | Loss |
| Andre Ilagan | Win |
| Toby Samuel | Loss |
| Hayato Matsuoka | Loss |
| Semen Pankin | Win |
| Chun Hsin Tseng | Loss |
| Marat Sharipov | Loss |
Season 2022
| Tournament | Competition | Date | Finish |
|---|
| Yokkaichi Japan | ATP Challenger | 22 November 2022 | Champion |
| Round / date | Players | Set scores |
|---|
| Final · 27 November 2022 | F. Ferreira Silva / Y. Watanuki [3] | 2:6 · 2:6 · 0:2 |
| Semi-final · 26 November 2022 | Y. Watanuki [3] / J. Duckworth [2] | 7:6 · 6:3 · 2:0 |
| Quarter-final · 25 November 2022 | Y. Chung / Y. Watanuki [3] | 2:6 · 2:5 |
| Round of 16 · 24 November 2022 | B. Zhukayev / Y. Watanuki [3] | 0:6 · 1:4 |
| First round · 22 November 2022 | Z. Kolar / Y. Watanuki [3] | 2:6 · 4:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Kobe Japan | ATP Challenger | 15 November 2022 | Champion |
| Round / date | Players | Set scores |
|---|
| Final · 20 November 2022 | Y. Watanuki [7] / F. Ferreira Silva | 6:7 · 7:5 · 6:4 · 2:1 |
| Semi-final · 19 November 2022 | C. O'Connell [1] / Y. Watanuki [7] | 4:6 · 6:7 · 0:2 |
| Quarter-final · 18 November 2022 | R. Ramanathan / Y. Watanuki [7] | 5:7 · 1:6 · 0:2 |
| Round of 16 · 17 November 2022 | S. Shimabukuro / Y. Watanuki [7] | 4:6 · 2:6 · 0:2 |
| First round · 15 November 2022 | Y. Chung [Q] / Y. Watanuki [7] | 2:6 · 2:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Matsuyama Japan | ATP Challenger | 8 November 2022 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 8 November 2022 | J. Jung [Q] / Y. Watanuki | 7:5 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Yokohama Japan | ATP Challenger | 31 October 2022 | Final |
| Round / date | Players | Set scores |
|---|
| Final · 6 November 2022 | C. O'Connell [1] / Y. Watanuki [7] | 6:1 · 6:7 · 6:3 · 2:1 |
| Semi-final · 5 November 2022 | Y. Watanuki [7] / N. Serdarusic | 7:5 · 7:6 · 2:0 |
| Quarter-final · 4 November 2022 | Y. Watanuki [7] / K. Uchida [3] | 7:5 · 4:6 · 6:3 · 2:1 |
| Round of 16 · 2 November 2022 | Y. Watanuki [7] / T. Ito | 5:7 · 6:0 · 2:1 |
| First round · 31 October 2022 | Y. Watanuki [7] / N. Nakagawa | 6:4 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Korea Open South Korea | ATP Tour | 26 September 2022 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 26 September 2022 | Y. Watanuki [Q] / J. Munar | 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Nonthaburi (III) Thailand | ATP Challenger | 5 September 2022 | Quarter-final |
| Round / date | Players | Set scores |
|---|
| Quarter-final · 9 September 2022 | Y. Watanuki [1] / S. Shimabukuro | 6:7 · 0:6 · 0:2 |
| Round of 16 · 7 September 2022 | Y. Watanuki [1] / B. Zhukayev | 6:3 · 6:3 · 2:0 |
| First round · 5 September 2022 | Y. Watanuki [1] / Y. Chung | 7:5 · 6:7 · 5:3 |
| Tournament | Competition | Date | Finish |
|---|
| Nonthaburi (II) Thailand | ATP Challenger | 30 August 2022 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 1 September 2022 | Y. Watanuki [1] / V. Vacherot | 6:7 · 3:6 · 0:2 |
| First round · 30 August 2022 | Y. Watanuki [1] / A. Kachmazov | 6:1 · 6:3 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Citi Open USA | ATP Tour | 1 August 2022 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 1 August 2022 | K. Edmund / Y. Watanuki [Q] | 6:4 · 7:6 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Indianapolis USA | ATP Challenger | 18 July 2022 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 18 July 2022 | Y. Watanuki / A. Galarneau | 3:6 · 3:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Open Parc Auvergne-Rhône-Alpes France | ATP Tour | 16 May 2022 | Quarter-final |
| Round / date | Players | Set scores |
|---|
| Quarter-final · 19 May 2022 | Y. Watanuki [LL] / A. de Minaur [4] | 4:6 |
| Round of 16 · 17 May 2022 | Y. Watanuki [LL] / S. Kwon | 6:3 · 6:4 · 2:0 |
| First round · 16 May 2022 | P. Martinez [8] / Y. Watanuki [LL] | 7:6 · 4:6 · 2:6 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Tallahassee USA | ATP Challenger | 19 April 2022 | Quarter-final |
| Round / date | Players | Set scores |
|---|
| Quarter-final · 22 April 2022 | D. Galan Riveros [3] / Y. Watanuki | 6:3 · 6:4 · 2:0 |
| Round of 16 · 20 April 2022 | Y. Watanuki / G. Lama | 7:6 · 6:0 · 2:0 |
| First round · 19 April 2022 | G. Brouwer / Y. Watanuki | 1:6 · 6:1 · 6:7 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Sarasota USA | ATP Challenger | 11 April 2022 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 14 April 2022 | S. Johnson [4] / Y. Watanuki | 3:6 · 6:4 · 6:1 · 2:1 |
| First round · 11 April 2022 | Y. Watanuki / J. Jung | 6:2 · 6:2 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Salinas Ecuador | ATP Challenger | 5 April 2022 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 5 April 2022 | Y. Watanuki / R. Quiroz | 6:7 · 2:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Davis Cup Qualifiers (worldwide) | Team competition | 4 March 2022 | Qualifying |
| Round / date | Players | Set scores |
|---|
| Qualifying · 5 March 2022 | E. Ymer / Y. Watanuki | 6:3 · 6:3 · 2:0 |
| Qualifying · 4 March 2022 | D. Madaras / Y. Watanuki | 4:6 · 4:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Forli (IV) Italy | ATP Challenger | 15 February 2022 | Semi-final |
| Round / date | Players | Set scores |
|---|
| Semi-final · 19 February 2022 | J. Draper / Y. Watanuki | 6:3 · 4:6 · 6:3 · 2:1 |
| Quarter-final · 18 February 2022 | G. Barrere [3] / Y. Watanuki | 5:7 · 3:6 · 0:2 |
| Round of 16 · 16 February 2022 | M. Marterer / Y. Watanuki | 7:5 · 2:6 · 3:6 · 1:2 |
| First round · 15 February 2022 | Y. Watanuki / J. de Jong [7] | 6:2 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Columbus USA | ATP Challenger | 25 January 2022 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 25 January 2022 | Y. Nishioka [3] / Y. Watanuki | 6:4 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Traralgon Australia | ATP Challenger | 3 January 2022 | Second round |
| Round / date | Players | Set scores |
|---|
| Second round · 6 January 2022 | Y. Watanuki / M. Kukushkin [8] | 6:7 · 1:6 · 0:2 |
| First round · 3 January 2022 | Y. Watanuki / J. Jin | 6:3 · 7:6 · 2:0 |
Season 2023
| Tournament | Competition | Date | Finish |
|---|
| Yokkaichi Japan | ATP Challenger | 28 November 2023 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 30 November 2023 | Y. Watanuki [1] / G. Fonio | 6:3 · 2:6 · 5:7 · 1:2 |
| First round · 28 November 2023 | Y. Watanuki [1] / Y. Shimizu | 6:3 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Yokohama Japan | ATP Challenger | 21 November 2023 | Champion |
| Round / date | Players | Set scores |
|---|
| Final · 26 November 2023 | Y. Watanuki [1] / Y. Shimizu | 7:6 · 6:4 · 2:0 |
| Semi-final · 25 November 2023 | Y. Watanuki [1] / M. Mmoh [3] | 6:4 · 6:7 · 6:0 · 2:1 |
| Quarter-final · 24 November 2023 | Y. Watanuki [1] / G. Fonio [LL] | 3:6 · 6:2 · 6:1 · 2:1 |
| Round of 16 · 23 November 2023 | Y. Watanuki [1] / M. Erhard [LL] | 6:4 · 6:3 · 2:0 |
| First round · 21 November 2023 | Y. Watanuki [1] / Y. Hsu | 6:3 · 6:3 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Open de Moselle France | ATP Tour | 6 November 2023 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 6 November 2023 | H. Mayot [Q] / Y. Watanuki | 6:4 · 1:6 · 6:4 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Japan Open Tennis Championships Japan | ATP Tour | 17 October 2023 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 17 October 2023 | Y. Watanuki [WC] / C. Ruud [2] | 6:7 · 3:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Shanghai Rolex Masters China | ATP Masters | 5 October 2023 | Second round |
| Round / date | Players | Set scores |
|---|
| Second round · 7 October 2023 | Y. Watanuki / T. Fritz [7] | 6:7 · 7:6 · 4:6 · 1:2 |
| First round · 5 October 2023 | Y. Watanuki / J. Shang [WC] | 7:6 · 4:6 · 6:4 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Shanghai China | ATP Challenger | 5 September 2023 | Final |
| Round / date | Players | Set scores |
|---|
| Final · 10 September 2023 | C. O'Connell [1] / Y. Watanuki [2] | 6:3 · 7:5 · 2:0 |
| Semi-final · 9 September 2023 | J. Shang [4] / Y. Watanuki [2] | 4:6 · 2:6 · 0:2 |
| Quarter-final · 8 September 2023 | H. Ly [Q] / Y. Watanuki [2] | 2:6 · 0:6 · 0:2 |
| Round of 16 · 7 September 2023 | M. Haliak / Y. Watanuki [2] | 1:6 · 1:6 · 0:2 |
| First round · 5 September 2023 | A. Bolt / Y. Watanuki [2] | 4:6 · 0:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| US Open USA | Grand Slam | 28 August 2023 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 28 August 2023 | A. Mannarino [22] / Y. Watanuki | 7:5 · 6:7 · 6:3 · 7:5 · 3:1 |
| Tournament | Competition | Date | Finish |
|---|
| Stanford USA | ATP Challenger | 15 August 2023 | Semi-final |
| Round / date | Players | Set scores |
|---|
| Semi-final · 18 August 2023 | C. Lestienne [4] / Y. Watanuki [2] | Not available |
| Quarter-final · 17 August 2023 | J. Duckworth [6] / Y. Watanuki [2] | 1:6 · 3:6 · 0:2 |
| Round of 16 · 17 August 2023 | N. Moreno de Alboran / Y. Watanuki [2] | 5:7 · 3:6 · 0:2 |
| First round · 15 August 2023 | S. Johnson / Y. Watanuki [2] | 5:7 · 7:5 · 4:6 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Mubadala Citi DC Open USA | ATP Tour | 31 July 2023 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 3 August 2023 | U. Humbert [13] / Y. Watanuki | 6:0 · 6:2 · 2:0 |
| Second round · 2 August 2023 | Y. Watanuki / F. Auger-Aliassime [3] | 7:6 · 7:6 · 2:0 |
| First round · 31 July 2023 | Y. Watanuki / Y. Wu | 1:4 |
| Tournament | Competition | Date | Finish |
|---|
| Wimbledon England | Grand Slam | 5 July 2023 | Second round |
| Round / date | Players | Set scores |
|---|
| Second round · 7 July 2023 | A. Zverev [19] / Y. Watanuki [LL] | 6:4 · 5:7 · 6:2 · 6:2 · 3:1 |
| First round · 5 July 2023 | M. Hüsler / Y. Watanuki [LL] | 7:6 · 7:5 · 6:7 · 6:7 · 3:6 · 2:3 |
| Tournament | Competition | Date | Finish |
|---|
| Ilkley England | ATP Challenger | 20 June 2023 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 20 June 2023 | R. Hijikata / Y. Watanuki [8] | 7:6 · 7:5 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Boss Open Germany | ATP Tour | 12 June 2023 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 14 June 2023 | H. Hurkacz [4] / Y. Watanuki [Q] | 4:6 · 7:6 · 7:6 · 2:1 |
| First round · 12 June 2023 | F. Lopez [WC] / Y. Watanuki [Q] | 6:7 · 3:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Turin Italy | ATP Challenger | 16 May 2023 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 16 May 2023 | Y. Watanuki [ALT] / S. Caruso [Q] | 6:2 · 3:6 · 4:6 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Cagliari Italy | ATP Challenger | 3 May 2023 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 4 May 2023 | B. Gojo / Y. Watanuki | 6:4 · 7:5 · 2:0 |
| First round · 3 May 2023 | Y. Watanuki / T. Monteiro [8] | 6:4 · 4:2 |
| Tournament | Competition | Date | Finish |
|---|
| Mutua Madrid Open Spain | ATP Masters | 27 April 2023 | Second round |
| Round / date | Players | Set scores |
|---|
| Second round · 29 April 2023 | Y. Watanuki [ALT] / C. Norrie [11] | 4:6 · 6:7 · 0:2 |
| First round · 27 April 2023 | C. Moutet / Y. Watanuki [ALT] | 3:6 · 3:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| US Men's Clay Court Championships USA | ATP Tour | 4 April 2023 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 4 April 2023 | Y. Hanfmann [Q] / Y. Watanuki [Q] | 6:4 · 3:6 · 6:2 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Miami Open USA | ATP Masters | 23 March 2023 | Second round |
| Round / date | Players | Set scores |
|---|
| Second round · 26 March 2023 | Y. Watanuki [Q] / F. Tiafoe [12] | 7:6 · 6:7 · 4:6 · 1:2 |
| First round · 23 March 2023 | Y. Watanuki [Q] / B. Paire [Q] | 6:4 · 7:5 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Monterrey Mexico | ATP Challenger | 21 February 2023 | Semi-final |
| Round / date | Players | Set scores |
|---|
| Semi-final · 26 February 2023 | B. Gojo / Y. Watanuki [8] | 7:6 · 6:4 · 2:0 |
| Quarter-final · 25 February 2023 | D. Kudla [3] / Y. Watanuki [8] | 6:3 · 6:7 · 2:6 · 1:2 |
| Round of 16 · 23 February 2023 | B. Paire / Y. Watanuki [8] | 6:7 · 1:6 · 0:2 |
| First round · 21 February 2023 | J. Van Deinse [WC] / Y. Watanuki [8] | 0:6 · 1:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Australian Open Australia | Grand Slam | 16 January 2023 | Second round |
| Round / date | Players | Set scores |
|---|
| Second round · 18 January 2023 | S. Korda [29] / Y. Watanuki [Q] | 6:2 · 7:5 · 6:4 · 3:0 |
| First round · 16 January 2023 | Y. Watanuki [Q] / A. Rinderknech | 6:3 · 6:3 · 6:2 · 3:0 |
| Tournament | Competition | Date | Finish |
|---|
| Canberra Australia | ATP Challenger | 3 January 2023 | Semi-final |
| Round / date | Players | Set scores |
|---|
| Semi-final · 6 January 2023 | M. Fucsovics [1] / Y. Watanuki | 6:2 · 7:5 · 2:0 |
| Quarter-final · 5 January 2023 | N. Gombos [4] / Y. Watanuki | 5:7 · 4:6 · 0:2 |
| Round of 16 · 4 January 2023 | Y. Watanuki / J. Rodionov [7] | 6:4 · 5:7 · 7:6 · 2:1 |
| First round · 3 January 2023 | Y. Watanuki / L. van Assche | 4:6 · 6:4 · 6:3 · 2:1 |
Season 2024
| Tournament | Competition | Date | Finish |
|---|
| Kobe Japan | ATP Challenger | 12 November 2024 | Quarter-final |
| Round / date | Players | Set scores |
|---|
| Quarter-final · 15 November 2024 | Y. Watanuki [WC] / A. Blockx | 2:6 · 6:3 · 6:7 · 1:2 |
| Round of 16 · 14 November 2024 | T. Atmane [7] / Y. Watanuki [WC] | 6:7 · 5:7 · 0:2 |
| First round · 12 November 2024 | M. Polmans / Y. Watanuki [WC] | Not available |
| Tournament | Competition | Date | Finish |
|---|
| Matsuyama Japan | ATP Challenger | 5 November 2024 | Semi-final |
| Round / date | Players | Set scores |
|---|
| Semi-final · 9 November 2024 | Y. Watanuki / A. Bolt | 3:6 · 6:4 · 3:6 · 1:2 |
| Quarter-final · 8 November 2024 | K. Isomura [Q] / Y. Watanuki | 0:6 · 5:7 · 0:2 |
| Round of 16 · 7 November 2024 | Y. Watanuki / H. Moriya [LL] | 6:2 · 6:0 · 2:0 |
| First round · 5 November 2024 | Y. Watanuki / Y. Zhou [Q] | 5:7 · 6:3 · 6:3 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Taipei City (II) Taiwan | ATP Challenger | 23 October 2024 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 23 October 2024 | Y. Hsu / Y. Watanuki | 6:3 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Shanghai Rolex Masters China | ATP Masters | 3 October 2024 | Third round |
| Round / date | Players | Set scores |
|---|
| Third round · 8 October 2024 | T. Fritz [7] / Y. Watanuki [Q] | 6:3 · 6:4 · 2:0 |
| Second round · 5 October 2024 | Y. Watanuki [Q] / B. Nakashima [32] | 7:6 · 6:3 · 2:0 |
| First round · 3 October 2024 | P. Kotov / Y. Watanuki [Q] | 7:6 · 4:6 · 5:7 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Shanghai China | ATP Challenger | 2 September 2024 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 5 September 2024 | Y. Watanuki / Y. Hsu [9] | 6:2 · 4:6 · 0:4 |
| First round · 2 September 2024 | R. Te [WC] / Y. Watanuki | 4:6 · 5:7 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Australian Open Australia | Grand Slam | 15 January 2024 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 15 January 2024 | M. Kecmanovic / Y. Watanuki | 4:6 · 7:5 · 6:3 · 6:4 · 3:1 |
Season 2025
| Tournament | Competition | Date | Finish |
|---|
| Kobe Japan | ATP Challenger | 11 November 2025 | Champion |
| Round / date | Players | Set scores |
|---|
| Final · 16 November 2025 | Y. Watanuki [4] / E. Ymer [7] | 3:6 · 6:1 · 6:4 · 2:1 |
| Semi-final · 15 November 2025 | C. Tseng [1] / Y. Watanuki [4] | 6:2 · 2:6 · 1:6 · 1:2 |
| Quarter-final · 14 November 2025 | Y. Watanuki [4] / H. Grenier [5] | 7:6 · 6:3 · 2:0 |
| Round of 16 · 12 November 2025 | Y. Watanuki [4] / F. Ferreira Silva | 6:4 · 6:4 · 2:0 |
| First round · 11 November 2025 | Y. Watanuki [4] / K. Bigun | 6:4 · 6:2 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Seoul South Korea | ATP Challenger | 28 October 2025 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 28 October 2025 | K. Isomura [Q] / Y. Watanuki [7] | 5:2 · 0:0 |
| Tournament | Competition | Date | Finish |
|---|
| Jinan China | ATP Challenger | 7 October 2025 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 7 October 2025 | Y. Watanuki / B. Harris | 6:1 · 3:6 · 2:6 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Kinoshita Group Japan Open Japan | ATP Tour | 24 September 2025 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 24 September 2025 | Y. Watanuki [WC] / N. Borges | 6:2 · 4:6 · 1:6 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Shanghai China | ATP Challenger | 3 September 2025 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 3 September 2025 | R. Noguchi / Y. Watanuki [2] | 6:4 · 7:5 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| National Bank Open Canada | ATP Masters | 28 July 2025 | Second round |
| Round / date | Players | Set scores |
|---|
| Second round · 30 July 2025 | F. Tiafoe [7] / Y. Watanuki [Q] | 1:6 · 7:5 · 7:6 · 2:1 |
| First round · 28 July 2025 | Y. Watanuki [Q] / D. Altmaier | 3:6 · 6:1 · 6:4 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Granby Canada | ATP Challenger | 15 July 2025 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 16 July 2025 | Y. Watanuki [4] / Y. Shimizu | Not available |
| First round · 15 July 2025 | Y. Watanuki [4] / K. Sell | 6:3 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Newport USA | ATP Challenger | 8 July 2025 | Quarter-final |
| Round / date | Players | Set scores |
|---|
| Quarter-final · 11 July 2025 | Z. Svajda / Y. Watanuki [8] | 7:5 · 6:4 · 2:0 |
| Round of 16 · 11 July 2025 | O. Weightman [Q] / Y. Watanuki [8] | 2:6 · 3:6 · 0:2 |
| First round · 8 July 2025 | O. Jasika / Y. Watanuki [8] | 4:6 · 4:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Ilkley England | ATP Challenger | 10 June 2025 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 10 June 2025 | J. Brooksby / Y. Watanuki | 7:6 · 6:3 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Birmingham England | ATP Challenger | 3 June 2025 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 4 June 2025 | R. Hijikata [3] / Y. Watanuki [Q] | 6:1 · 6:3 · 2:0 |
| First round · 3 June 2025 | Y. Watanuki [Q] / A. Blockx [ALT] | 6:4 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Wuxi China | ATP Challenger | 5 May 2025 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 7 May 2025 | Y. Watanuki / R. Peniston | 5:7 · 6:4 · 3:6 · 1:2 |
| First round · 5 May 2025 | Y. Watanuki / Y. Zhou [WC] | 1:6 · 7:6 · 6:4 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Guangzhou China | ATP Challenger | 29 April 2025 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 30 April 2025 | Y. Watanuki / I. Simakin [ALT] | 4:6 · 6:7 · 0:2 |
| First round · 29 April 2025 | L. Tu [5] / Y. Watanuki | 4:6 · 7:6 · 3:6 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Gwangju South Korea | ATP Challenger | 23 April 2025 | Semi-final |
| Round / date | Players | Set scores |
|---|
| Semi-final · 26 April 2025 | Y. Watanuki / A. Kachmazov | 4:6 · 3:6 · 0:2 |
| Quarter-final · 25 April 2025 | Y. Watanuki / B. Holt [3] | 7:5 · 7:6 · 2:0 |
| Round of 16 · 24 April 2025 | Y. Watanuki / J. Monday | 6:3 · 6:7 · 6:4 · 2:1 |
| First round · 23 April 2025 | J. McCabe [8] / Y. Watanuki | 6:7 · 3:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Busan South Korea | ATP Challenger | 15 April 2025 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 15 April 2025 | Y. Watanuki / A. Bolt [3] | 3:6 · 6:7 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| BNP Paribas Open USA | ATP Masters | 6 March 2025 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 11 March 2025 | T. Griekspoor / Y. Watanuki [Q] | 7:6 · 6:1 · 2:0 |
| Second round · 10 March 2025 | Y. Watanuki [Q] / F. Tiafoe [16] | 6:4 · 7:6 · 2:0 |
| First round · 8 March 2025 | T. Machac [19] / Y. Watanuki [Q] | 6:4 · 2:4 · 1:0 |
| First round · 6 March 2025 | A. Bublik / Y. Watanuki [Q] | 3:6 · 6:3 · 3:6 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Canberra Australia | ATP Challenger | 31 December 2024 | Quarter-final |
| Round / date | Players | Set scores |
|---|
| Quarter-final · 2 January 2025 | Y. Watanuki / M. Landaluce | 0:0 · 0:0 |
| Round of 16 · 1 January 2025 | Y. Watanuki / R. Burruchaga [LL] | 6:3 · 3:6 · 7:6 · 2:1 |
| First round · 31 December 2024 | H. Gaston [1] / Y. Watanuki | 2:6 · 2:6 · 0:2 |
Season 2026
| Tournament | Competition | Date | Finish |
|---|
| Shanghai China | ATP Challenger | 7 September 2026 | Third round |
| Round / date | Players | Set scores |
|---|
| Third round · 7 September 2026 | Y. Watanuki / M. Sharipov | 7:6 · 5:7 · 2:6 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Zhangjiagang China | ATP Challenger | 31 August 2026 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 2 September 2026 | C. Tseng [3] / Y. Watanuki | 7:5 · 6:3 · 2:0 |
| Third round · 31 August 2026 | Y. Watanuki / S. Pankin | 6:3 · 7:5 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Vancouver Canada | ATP Challenger | 29 July 2026 | Third round |
| Round / date | Players | Set scores |
|---|
| Third round · 29 July 2026 | Y. Watanuki [ALT] / H. Matsuoka [LL] | 4:6 · 2:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Winnipeg Canada | ATP Challenger | 21 July 2026 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 23 July 2026 | Y. Watanuki / T. Samuel [2] | 0:6 · 1:6 · 0:2 |
| Third round · 21 July 2026 | Y. Watanuki / A. Ilagan | 7:6 · 7:5 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Granby Canada | ATP Challenger | 14 July 2026 | Third round |
| Round / date | Players | Set scores |
|---|
| Third round · 14 July 2026 | A. Holmgren [3] / Y. Watanuki | 6:7 · 6:4 · 7:5 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Cary USA | ATP Challenger | 30 June 2026 | Semi-final |
| Round / date | Players | Set scores |
|---|
| Semi-final · 5 July 2026 | Y. Watanuki / B. Shick | Not available |
| Quarter-final · 3 July 2026 | J. Kennedy / Y. Watanuki | 1:6 · 4:6 · 0:2 |
| Round of 16 · 1 July 2026 | Y. Watanuki / T. Wu | 6:3 · 6:7 · 6:1 · 2:1 |
| Third round · 30 June 2026 | Y. Watanuki / A. Ilagan | 3:6 · 6:0 · 6:3 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Bratislava Slovakia | ATP Challenger | 8 June 2026 | Third round |
| Round / date | Players | Set scores |
|---|
| Third round · 8 June 2026 | V. Sachko / Y. Watanuki | 6:2 · 7:6 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Prostejov Czechia | ATP Challenger | 1 June 2026 | Third round |
| Round / date | Players | Set scores |
|---|
| Third round · 1 June 2026 | Y. Watanuki / P. Boscardin Dias | 6:1 · 6:7 · 0:3 · 1:1 |
| Tournament | Competition | Date | Finish |
|---|
| Chisinau Moldova | ATP Challenger | 26 May 2026 | Third round |
| Round / date | Players | Set scores |
|---|
| Third round · 26 May 2026 | C. Cretu [Q] / Y. Watanuki | 6:1 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Thionville France | ATP Challenger | 3 March 2026 | Third round |
| Round / date | Players | Set scores |
|---|
| Third round · 3 March 2026 | U. Blanchet [8] / Y. Watanuki [Q] | 6:7 · 6:2 · 3:0 · 1:1 |
| Tournament | Competition | Date | Finish |
|---|
| Davis Cup Qualifiers (worldwide) | Team competition | 6 February 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 6 February 2026 | Y. Watanuki / S. Ofner | 6:3 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Phan Thiet Vietnam | ATP Challenger | 20 January 2026 | Third round |
| Round / date | Players | Set scores |
|---|
| Third round · 20 January 2026 | Y. Watanuki [1] / O. Jasika | 6:2 · 3:6 · 5:7 · 1:2 |
Additional tournament results
| Tournament | Competition | Date | Finish |
|---|
| Shanghai China | ATP Challenger | 7 September 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 7 September 2026 | Y. Watanuki / M. Sharipov | 7:6 · 5:7 · 2:6 · 1:2 |
| Tournament | Competition | Date | Finish |
|---|
| Zhangjiagang China | ATP Challenger | 31 August 2026 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 2 September 2026 | C. Tseng [3] / Y. Watanuki | 7:5 · 6:3 · 2:0 |
| First round · 31 August 2026 | Y. Watanuki / S. Pankin | 6:3 · 7:5 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Vancouver Canada | ATP Challenger | 29 July 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 29 July 2026 | Y. Watanuki [ALT] / H. Matsuoka [LL] | 4:6 · 2:6 · 0:2 |
| Tournament | Competition | Date | Finish |
|---|
| Winnipeg Canada | ATP Challenger | 21 July 2026 | Round of 16 |
| Round / date | Players | Set scores |
|---|
| Round of 16 · 23 July 2026 | Y. Watanuki / T. Samuel [2] | 0:6 · 1:6 · 0:2 |
| First round · 21 July 2026 | Y. Watanuki / A. Ilagan | 7:6 · 7:5 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Granby Canada | ATP Challenger | 14 July 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 14 July 2026 | A. Holmgren [3] / Y. Watanuki | 6:7 · 6:4 · 7:5 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Cary USA | ATP Challenger | 30 June 2026 | Semi-final |
| Round / date | Players | Set scores |
|---|
| Semi-final · 5 July 2026 | Y. Watanuki / B. Shick | Not available |
| Quarter-final · 3 July 2026 | J. Kennedy / Y. Watanuki | 1:6 · 4:6 · 0:2 |
| Round of 16 · 1 July 2026 | Y. Watanuki / T. Wu | 6:3 · 6:7 · 6:1 · 2:1 |
| First round · 30 June 2026 | Y. Watanuki / A. Ilagan | 3:6 · 6:0 · 6:3 · 2:1 |
| Tournament | Competition | Date | Finish |
|---|
| Bratislava Slovakia | ATP Challenger | 8 June 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 8 June 2026 | V. Sachko / Y. Watanuki | 6:2 · 7:6 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Prostejov Czechia | ATP Challenger | 1 June 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 1 June 2026 | Y. Watanuki / P. Boscardin Dias | 6:1 · 6:7 · 0:3 · 1:1 |
| Tournament | Competition | Date | Finish |
|---|
| Chisinau Moldova | ATP Challenger | 26 May 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 26 May 2026 | C. Cretu [Q] / Y. Watanuki | 6:1 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Thionville France | ATP Challenger | 3 March 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 3 March 2026 | U. Blanchet [8] / Y. Watanuki [Q] | 6:7 · 6:2 · 3:0 · 1:1 |
| Tournament | Competition | Date | Finish |
|---|
| Davis Cup Qualifiers (worldwide) | Team competition | 6 February 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 6 February 2026 | Y. Watanuki / S. Ofner | 6:3 · 6:4 · 2:0 |
| Tournament | Competition | Date | Finish |
|---|
| Phan Thiet Vietnam | ATP Challenger | 20 January 2026 | First round |
| Round / date | Players | Set scores |
|---|
| First round · 20 January 2026 | Y. Watanuki [1] / O. Jasika | 6:2 · 3:6 · 5:7 · 1:2 |