Select tournament type
| Semi-finals | Watanuki Y. | Krueger M. | 1:2 (6:3, 2:6, 3:6) | details | 04.01.2026 | ||
| Final | Watanuki Y. | Ymer E. | 2:1 (3:6, 6:1, 6:4) | details | 16.11.2025 | ||
| Semi-finals | Tseng C. H. | Watanuki Y. | 1:2 (6:2, 2:6, 1:6) | details | 15.11.2025 | ||
| Quarter-finals | Watanuki Y. | Grenier H. | 2:0 (7:611, 6:3) | details | 14.11.2025 | ||
| 1/8-finals | Watanuki Y. | Ferreira Silva F. | 2:0 (6:4, 6:4) | details | 12.11.2025 | ||
| 1/16-finals | Watanuki Y. | Bigun K. | 2:0 (6:4, 6:2) | details | 11.11.2025 | ||
| 1/16-finals | Isomura K. | Watanuki Y. | 0:0 RET. (5:2) | details | 28.10.2025 | ||
| 1/16-finals | Watanuki Y. | Harris B. | 1:2 (6:1, 3:6, 2:6) | details | 07.10.2025 | ||
| Final | Svrcina D. | Watanuki Y. | 2:0 (6:4, 6:0) | details | 30.09.2025 | ||
| Semi-finals | Liu H. | Watanuki Y. | 0:2 (63:7, 2:6) | details | 29.09.2025 | ||
| 1/16-finals | Watanuki Y. | Borges N. | 1:2 (6:2, 4:6, 1:6) | details | 24.09.2025 | ||
| 1/16-finals | Noguchi R. | Watanuki Y. | 2:0 (6:4, 7:5) | details | 03.09.2025 | ||
| Quarter-finals | Garin C. | Watanuki Y. | 2:0 (6:4, 6:4) | details | 18.08.2025 | ||
| Semi-finals | Watanuki Y. | Svrcina D. | 0:2 (2:6, 0:6) | details | 05.08.2025 | ||
| 1/32-finals | Tiafoe F. | Watanuki Y. | 2:1 (1:6, 7:5, 7:65) | details | 30.07.2025 | ||
| 1/64-finals | Watanuki Y. | Altmaier D. | 2:1 (3:6, 6:1, 6:4) | details | 28.07.2025 | ||
| Final | Svrcina D. | Watanuki Y. | 1:2 (62:7, 6:1, 4:6) | details | 26.07.2025 | ||
| Final | Svajda Z. | Watanuki Y. | 2:1 (6:3, 1:6, 7:62) | details | 20.07.2025 | ||
| Semi-finals | Fellows J. | Watanuki Y. | 0:2 (4:6, 4:6) | details | 20.07.2025 | ||
| 1/8-finals | Watanuki Y. | Shimizu Y. | WO. | details | 17.07.2025 | ||
| 1/16-finals | Watanuki Y. | Sell K. | 2:0 (6:3, 6:4) | details | 15.07.2025 | ||
| Quarter-finals | Svajda Z. | Watanuki Y. | 2:0 (7:5, 6:4) | details | 11.07.2025 | ||
| 1/8-finals | Weightman O. | Watanuki Y. | 0:2 (2:6, 3:6) | details | 11.07.2025 | ||
| 1/16-finals | Jasika O. | Watanuki Y. | 0:2 (4:6, 4:6) | details | 08.07.2025 | ||
| Final | Holmgren A. | Watanuki Y. | 3:2 (6:4, 62:7, 3:6, 7:611, 7:67) | details | 26.06.2025 | ||
| Semi-finals | Smith C. | Watanuki Y. | 0:2 (63:7, 3:6) | details | 25.06.2025 | ||
| Quarter-finals | Watanuki Y. | Monteiro T. | 1:0 RET. (7:69, 62:60) | details | 23.06.2025 | ||
| Semi-finals | Smith C. | Watanuki Y. | 2:1 (7:5, 4:6, 6:3) | details | 14.06.2025 | ||
| 1/16-finals | Brooksby J. | Watanuki Y. | 2:0 (7:65, 6:3) | details | 10.06.2025 | ||
| 1/8-finals | Hijikata R. | Watanuki Y. | 2:0 (6:1, 6:3) | details | 04.06.2025 | ||
| 1/16-finals | Watanuki Y. | Blockx A. | 2:0 (6:4, 6:4) | details | 03.06.2025 | ||
| Final | Watanuki Y. | Gueymard Wayenburg S. | 2:1 (7:63, 4:6, 6:1) | details | 02.06.2025 | ||
| Semi-finals | Watanuki Y. | Gray A. | 2:1 (6:4, 63:7, 6:1) | details | 01.06.2025 | ||
| 1/8-finals | Watanuki Y. | Peniston R. | 1:2 (5:7, 6:4, 3:6) | details | 07.05.2025 | ||
| 1/16-finals | Watanuki Y. | Zhou Y. | 2:1 (1:6, 7:63, 6:4) | details | 05.05.2025 | ||
| 1/8-finals | Watanuki Y. | Simakin I. | 0:2 (4:6, 66:7) | details | 30.04.2025 | ||
| 1/16-finals | Tu L. | Watanuki Y. | 1:2 (4:6, 7:68, 3:6) | details | 29.04.2025 | ||
| Semi-finals | Watanuki Y. | Kachmazov A. | 0:2 (4:6, 3:6) | details | 26.04.2025 | ||
| Quarter-finals | Watanuki Y. | Holt B. | 2:0 (7:5, 7:62) | details | 25.04.2025 | ||
| 1/8-finals | Watanuki Y. | Monday J. | 2:1 (6:3, 67:7, 6:4) | details | 24.04.2025 | ||
| 1/16-finals | McCabe J. | Watanuki Y. | 0:2 (612:7, 3:6) | details | 23.04.2025 | ||
| 1/16-finals | Watanuki Y. | Bolt A. | 0:2 (3:6, 64:7) | details | 15.04.2025 | ||
| Watanuki Y./Yuzuki T. | Krawietz K./Puetz T. | 0:2 (3:6, 64:7) | details | 13.09.2025 | |||
| Quarter-finals | Watanuki Y./Yuzuki T. | Isaro P./Kaliyanda Poonacha N. | 0:2 (4:6, 65:7) | details | 04.09.2025 | ||
| 1/8-finals | Hsu Y. H./Huang T. | Watanuki Y./Yuzuki T. | 1:2 (7:5, 5:7, 4:10) | details | 03.09.2025 | ||
| Quarter-finals | Watanuki Y./Yuzuki T. | Chandrasekar A./Stalder R. | 0:2 (1:6, 3:6) | details | 12.07.2025 | ||
| 1/8-finals | Kumar P./Sheehy J. | Watanuki Y./Yuzuki T. | 0:2 (66:7, 5:7) | details | 09.07.2025 | ||
| 1/8-finals | Riedi L./Watanuki Y. | Chandrasekar A./Ramanathan R. | 0:2 (4:6, 4:6) | details | 11.06.2025 | ||
| Quarter-finals | Hsu Y. H./Shimabukuro S. | Uchiyama Y./Watanuki Y. | WO. | details | 17.04.2025 | ||
| 1/8-finals | Uchiyama Y./Watanuki Y. | Escoffier A./Sanchez L. | 2:0 (6:0, 6:2) | details | 16.04.2025 | ||