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| 1/8-finals | Kawahashi Y. | Tyagi K. | 0:2 (4:6, 4:6) | detalhes | 13.05.2026 | ||
| 1/16-finals | Hernandez A. | Kawahashi Y. | 1:2 (3:6, 6:3, 4:6) | detalhes | 11.05.2026 | ||
| 1/16-finals | Hulme M. | Kawahashi Y. | 2:1 (61:7, 6:4, 6:4) | detalhes | 22.04.2026 | ||
| Quarter-finals | Peliwo F. | Kawahashi Y. | 2:1 (6:4, 0:6, 6:3) | detalhes | 17.04.2026 | ||
| 1/8-finals | Meng F. | Kawahashi Y. | 0:2 (0:6, 1:6) | detalhes | 16.04.2026 | ||
| 1/16-finals | Zhu E. | Kawahashi Y. | 0:2 (3:6, 3:6) | detalhes | 15.04.2026 | ||
| Quarter-finals | Kawahashi Y. | Hudd E. | 0:2 (1:6, 4:6) | detalhes | 03.04.2026 | ||
| 1/8-finals | Kawahashi Y. | Hazawa S. | 2:1 (2:6, 6:3, 7:64) | detalhes | 02.04.2026 | ||
| 1/16-finals | Kawahashi Y. | Matsui T. | 2:0 (6:1, 6:1) | detalhes | 01.04.2026 | ||
| 1/16-finals | Tomida Y. | Kawahashi Y. | 2:0 (6:2, 6:2) | detalhes | 25.03.2026 | ||
| Final | Filar K. | Kawahashi Y. | 2:0 (6:3, 7:63) | detalhes | 23.11.2025 | ||
| Semi-finals | Kawahashi Y. | Ferguson C. | 2:0 (6:3, 6:4) | detalhes | 22.11.2025 | ||
| Quarter-finals | Suksumrarn T. | Kawahashi Y. | 0:2 (3:6, 5:7) | detalhes | 21.11.2025 | ||
| 1/8-finals | Sarksian D. | Kawahashi Y. | 0:2 (3:6, 3:6) | detalhes | 20.11.2025 | ||
| 1/16-finals | Chen Y. C. | Kawahashi Y. | 1:2 (6:4, 0:6, 3:6) | detalhes | 19.11.2025 | ||
| Final | Weber A. | Kawahashi Y. | 0:2 (5:7, 4:6) | detalhes | 16.11.2025 | ||
| Semi-finals | Kawahashi Y. | Zhu E. | 2:0 (6:2, 6:1) | detalhes | 15.11.2025 | ||
| Quarter-finals | Horiuchi R. | Kawahashi Y. | 0:2 (4:6, 1:6) | detalhes | 14.11.2025 | ||
| 1/8-finals | Thurner N. | Kawahashi Y. | 0:2 (4:6, 4:6) | detalhes | 13.11.2025 | ||
| 1/16-finals | Aerne L. | Kawahashi Y. | 0:2 (3:6, 1:6) | detalhes | 12.11.2025 | ||
| Semi-finals | Nakagawa S. | Kawahashi Y. | 2:0 (6:3, 6:1) | detalhes | 02.11.2025 | ||
| Quarter-finals | Kawahashi Y. | Saitoh K. | 1:2 (6:4, 4:6, 2:6) | detalhes | 31.10.2025 | ||
| 1/8-finals | Kawahashi Y. | Nakanishi S. | 2:0 (6:1, 6:1) | detalhes | 30.10.2025 | ||
| 1/16-finals | Kawahashi Y. | Jiang F. | 2:1 (3:6, 6:4, 6:1) | detalhes | 28.10.2025 | ||
| 1/8-finals | Kawahashi Y. | Shick B. | 0:2 (2:6, 1:6) | detalhes | 23.10.2025 | ||
| 1/16-finals | Kawahashi Y. | Nakamura M. | 2:0 (6:0, 6:2) | detalhes | 21.10.2025 | ||
| Semi-finals | Broska F. | Kawahashi Y. | 2:1 (4:6, 6:4, 6:0) | detalhes | 05.10.2025 | ||
| Quarter-finals | Sesko Z. | Kawahashi Y. | 2:0 (6:0, 6:1) | detalhes | 03.10.2025 | ||
| 1/8-finals | Bertimon C. | Kawahashi Y. | 0:2 (3:6, 0:6) | detalhes | 02.10.2025 | ||
| 1/16-finals | Graca J. | Kawahashi Y. | 0:2 (2:6, 2:6) | detalhes | 01.10.2025 | ||
| 1/16-finals | Ogura K. | Kawahashi Y. | 2:0 (6:3, 7:5) | detalhes | 10.09.2025 | ||
| Final | Kawahashi Y. | Weber A. | 0:2 (2:6, 3:6) | detalhes | 07.09.2025 | ||
| Semi-finals | Kawahashi Y. | Chen X. D. | 2:0 (6:4, 6:4) | detalhes | 06.09.2025 | ||
| Quarter-finals | Ochi M. | Kawahashi Y. | 0:2 (4:6, 2:6) | detalhes | 05.09.2025 | ||
| 1/8-finals | Bessonov D. | Kawahashi Y. | 0:2 (3:6, 0:6) | detalhes | 04.09.2025 | ||
| 1/8-finals | Malaszszak M./Suksumrarn T. | Hazawa S./Kawahashi Y. | 2:0 (7:66, 6:2) | detalhes | 21.04.2026 | ||
| Semi-finals | Inui Y./Kawahashi Y. | Yang Z./Zheng Z. | 0:2 (3:6, 4:6) | detalhes | 17.04.2026 | ||
| Quarter-finals | Castelnuovo L./Hsu J. | Inui Y./Kawahashi Y. | WO. | detalhes | 16.04.2026 | ||
| 1/8-finals | Inui Y./Kawahashi Y. | Peliwo F./Ryan Ziegann S. | 2:1 (6:4, 4:6, 10:5) | detalhes | 14.04.2026 | ||
| Final | Kawahashi Y./Yamasaki J. | Saitoh K./Shiraishi H. | 0:2 (3:6, 4:6) | detalhes | 04.04.2026 | ||
| Semi-finals | Mitsui S./Yoshimura D. | Kawahashi Y./Yamasaki J. | 0:2 (4:6, 5:7) | detalhes | 03.04.2026 | ||
| Quarter-finals | Sim S./Sumizawa D. | Kawahashi Y./Yamasaki J. | 0:2 (3:6, 3:6) | detalhes | 03.04.2026 | ||
| 1/8-finals | Mischker F./Summers M. | Kawahashi Y./Yamasaki J. | 1:2 (64:7, 6:3, 5:10) | detalhes | 02.04.2026 | ||
| 1/8-finals | Fukuda S./Vithoontien L. | Kawahashi Y./Sumizawa D. | 2:1 (1:6, 6:4, 10:5) | detalhes | 24.03.2026 | ||
| Quarter-finals | Kawahashi Y./Masabayashi T. | Crowther C./Van Sambeek F. | 0:2 (3:6, 3:6) | detalhes | 13.11.2025 | ||
| 1/8-finals | Kawahashi Y./Masabayashi T. | Ward F./Ward G. | 2:0 (6:4, 6:2) | detalhes | 11.11.2025 | ||
| Quarter-finals | Shick B./Tanuma R. | Kawahashi Y./Takahata R. | 2:0 (6:3, 6:3) | detalhes | 30.10.2025 | ||
| 1/8-finals | Kawahashi Y./Takahata R. | Matsumura R./Yamamoto N. | 2:1 (4:6, 6:3, 10:5) | detalhes | 28.10.2025 | ||
| 1/8-finals | Kawahashi Y./Ochi M. | Planinsek F. J./Sesko Z. | 0:2 (4:6, 3:6) | detalhes | 30.09.2025 | ||
| Quarter-finals | Aggarwal P./Host T. | Fukuda S./Kawahashi Y. | 2:1 (6:3, 3:6, 13:11) | detalhes | 04.09.2025 | ||