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| Quarter-finals | Magadan A. | Saitoh K. | 2:1 (3:6, 6:3, 6:4) | details | 29.05.2026 | ||
| 1/8-finals | Saitoh K. | Sach T. | 2:0 (7:5, 6:0) | details | 28.05.2026 | ||
| 1/16-finals | Oh H. T. | Saitoh K. | 1:2 (4:6, 6:3, 5:7) | details | 27.05.2026 | ||
| Quarter-finals | Kim D. J. | Saitoh K. | 2:0 (6:2, 7:65) | details | 22.05.2026 | ||
| 1/8-finals | Heck H. | Saitoh K. | 0:2 (1:6, 1:6) | details | 21.05.2026 | ||
| 1/16-finals | Saitoh K. | Dellavedova M. | 2:0 (7:62, 6:3) | details | 20.05.2026 | ||
| Final | Roh H. | Saitoh K. | 0:2 (4:6, 1:6) | details | 17.05.2026 | ||
| Semi-finals | Shin W. | Saitoh K. | 1:2 (4:6, 7:5, 5:7) | details | 16.05.2026 | ||
| Quarter-finals | Saitoh K. | Shin S. | 2:1 (6:3, 2:6, 6:4) | details | 15.05.2026 | ||
| 1/8-finals | Hazawa S. | Saitoh K. | 0:2 (3:6, 1:6) | details | 14.05.2026 | ||
| 1/16-finals | Saitoh K. | Suzuki K. | 2:0 (6:3, 6:1) | details | 13.05.2026 | ||
| 1/16-finals | Summers M. | Saitoh K. | 2:0 (7:5, 6:3) | details | 21.04.2026 | ||
| 1/8-finals | Hudd E. | Saitoh K. | 2:0 (6:4, 6:4) | details | 16.04.2026 | ||
| 1/16-finals | Saitoh K. | Becroft I. | 2:0 (6:2, 7:6) | details | 15.04.2026 | ||
| 1/8-finals | Ferguson C. | Saitoh K. | 2:0 (6:4, 6:3) | details | 02.04.2026 | ||
| 1/16-finals | Zamora N. | Saitoh K. | 0:2 (3:6, 3:6) | details | 31.03.2026 | ||
| 1/16-finals | Hudd E. | Saitoh K. | 2:0 (6:3, 7:67) | details | 24.03.2026 | ||
| 1/8-finals | Saitoh K. | Tu L. | 0:2 (1:6, 4:6) | details | 05.03.2026 | ||
| 1/16-finals | Saitoh K. | Charlton J. | 2:0 (6:3, 7:5) | details | 04.03.2026 | ||
| Quarter-finals | Aguiard E. | Saitoh K. | 2:0 (6:3, 6:1) | details | 27.02.2026 | ||
| 1/8-finals | Saitoh K. | Sach T. | 2:0 (6:4, 7:5) | details | 26.02.2026 | ||
| 1/16-finals | Saitoh K. | Adam-Gedge Z. | 2:0 (6:3, 6:3) | details | 25.02.2026 | ||
| Quarter-finals | Ovcharenko O. | Saitoh K. | 2:0 (7:62, 7:5) | details | 30.01.2026 | ||
| 1/8-finals | Saitoh K. | Castagnola L. | 2:1 (4:6, 7:5, 7:5) | details | 29.01.2026 | ||
| 1/16-finals | Sahtali T. | Saitoh K. | 0:2 (0:6, 1:6) | details | 28.01.2026 | ||
| 1/8-finals | Sakellaridis D. | Saitoh K. | 2:0 (6:1, 6:4) | details | 23.01.2026 | ||
| 1/16-finals | Saitoh K. | Nesterov P. | 2:1 (6:4, 4:6, 7:65) | details | 22.01.2026 | ||
| Final | Jeong Y./Kim J. | Oki Y./Saitoh K. | WO. | details | 30.05.2026 | ||
| Semi-finals | Oki Y./Saitoh K. | Shin S./Sim S. | 2:0 (6:4, 6:1) | details | 29.05.2026 | ||
| Quarter-finals | Oki Y./Saitoh K. | Isomura K./Ochi M. | WO. | details | 28.05.2026 | ||
| 1/8-finals | Oki Y./Saitoh K. | Cho Seung Woo/Lee D. H. | 2:0 (6:4, 6:4) | details | 26.05.2026 | ||
| Quarter-finals | Oki Y./Saitoh K. | Ichikawa T./Kawachi K. | 1:2 (5:7, 7:64, 6:10) | details | 21.05.2026 | ||
| 1/8-finals | Ann S./Kim G. J. | Oki Y./Saitoh K. | 1:2 (3:6, 6:2, 3:10) | details | 19.05.2026 | ||
| 1/8-finals | Shin S./Sim S. | Saitoh K./Shiraishi H. | 2:0 (6:2, 6:3) | details | 12.05.2026 | ||
| Quarter-finals | Ichikawa T./Saitoh K. | Shiraishi H./Takahata R. | 1:2 (6:3, 3:6, 3:10) | details | 23.04.2026 | ||
| 1/8-finals | Ichikawa T./Saitoh K. | Hulme M./Mehrotra A. | 2:0 (6:4, 7:5) | details | 21.04.2026 | ||
| Quarter-finals | Palan D./Yap M. H. | Imai S./Saitoh K. | WO. | details | 16.04.2026 | ||
| 1/8-finals | Jimenez M. D./Olivarez E. | Imai S./Saitoh K. | 0:2 (3:6, 0:6) | details | 15.04.2026 | ||
| Final | Kawahashi Y./Yamasaki J. | Saitoh K./Shiraishi H. | 0:2 (3:6, 4:6) | details | 04.04.2026 | ||
| Semi-finals | Saitoh K./Shiraishi H. | Ogura K./Vithoontien L. | 2:0 (7:66, 6:4) | details | 03.04.2026 | ||
| Quarter-finals | Tanuma R./Yamanaka T. | Saitoh K./Shiraishi H. | 0:2 (0:6, 2:6) | details | 03.04.2026 | ||
| 1/8-finals | Hashimoto H./Heck H. | Saitoh K./Shiraishi H. | 0:2 (3:6, 62:7) | details | 02.04.2026 | ||
| Quarter-finals | Adam-Gedge Z./Jones S. | Saitoh K./Yamanaka T. | 2:1 (4:6, 6:1, 11:9) | details | 05.03.2026 | ||
| 1/8-finals | Host T./Vujic S. | Saitoh K./Yamanaka T. | 1:2 (6:3, 2:6, 8:10) | details | 03.03.2026 | ||
| Final | Cook E./Sach T. | Saitoh K./Yamanaka T. | 2:0 (6:3, 6:2) | details | 28.02.2026 | ||
| Semi-finals | Delaney Je./Hulme M. | Saitoh K./Yamanaka T. | 0:2 (5:7, 5:7) | details | 27.02.2026 | ||
| Quarter-finals | Saitoh K./Yamanaka T. | Hazawa S./Rai A. | 2:0 (6:4, 6:4) | details | 26.02.2026 | ||
| 1/8-finals | Saitoh K./Yamanaka T. | Anderson G./Connaughton L. | 2:0 (7:67, 6:1) | details | 25.02.2026 | ||
| Quarter-finals | Barbieri A./Colombo A. | Saitoh K./Yamanaka T. | WO. | details | 24.01.2026 | ||
| 1/8-finals | Saitoh K./Yamanaka T. | Ovcharenko O./Perez Contri S. | 2:1 (0:6, 6:4, 10:3) | details | 23.01.2026 | ||