Select tournament type
| Semi-finals | Pieri S. | Watanabe S. | 2:0 (6:1, 6:4) | details | 01.03.2026 | ||
| Semi-finals | Watanabe S. | Kumasaka T. | 1:2 (3:6, 6:3, 4:6) | details | 20.10.2025 | ||
| Semi-finals | Bollipalli R./Ramanathan R. | Sun F./Watanabe S. | 2:0 (6:3, 6:2) | details | 07.06.2026 | ||
| Quarter-finals | Martinez L. D./Masur D. | Sun F./Watanabe S. | 1:2 (7:64, 4:6, 5:10) | details | 06.06.2026 | ||
| 1/8-finals | Martin D./Vandecasteele Q. | Sun F./Watanabe S. | 1:2 (6:3, 5:7, 5:10) | details | 04.06.2026 | ||
| Semi-finals | Kumar P./Poling K. | Shimizu Y./Watanabe S. | 2:1 (6:3, 3:6, 10:4) | details | 31.05.2026 | ||
| Quarter-finals | Shimizu Y./Watanabe S. | Basel V./Oliveira B. | WO. | details | 30.05.2026 | ||
| 1/8-finals | Shimizu Y./Watanabe S. | Fenty A./Perez B. | 2:1 (6:3, 2:6, 15:13) | details | 27.05.2026 | ||
| Semi-finals | Nam Ji S./Niklas-Salminen P. | Hsu Y. H./Watanabe S. | 2:1 (6:4, 5:7, 10:6) | details | 08.05.2026 | ||
| Quarter-finals | Hsu Y. H./Watanabe S. | Bollipalli R./Kadhe A. | 2:0 (6:3, 6:4) | details | 07.05.2026 | ||
| 1/8-finals | Hsu Y. H./Watanabe S. | Jung J./Uesugi K. | 2:1 (1:6, 6:4, 11:9) | details | 06.05.2026 | ||
| Final | Hsu Y. H./Watanabe S. | Nam Ji S./Niklas-Salminen P. | 0:2 (4:6, 4:6) | details | 02.05.2026 | ||
| Semi-finals | Noguchi R./Sun F. | Hsu Y. H./Watanabe S. | 1:2 (6:3, 0:6, 4:10) | details | 01.05.2026 | ||
| Quarter-finals | Hsu Y. H./Watanabe S. | Jung J./Uesugi K. | 2:0 (7:63, 7:62) | details | 01.05.2026 | ||
| 1/8-finals | Loof T./Yuzuki T. | Hsu Y. H./Watanabe S. | 0:2 (4:6, 4:6) | details | 30.04.2026 | ||
| 1/8-finals | Hsu Y. H./Watanabe S. | Shimizu Y./Uesugi K. | 0:2 (1:6, 3:6) | details | 23.04.2026 | ||
| 1/8-finals | Hsu Y. H./Watanabe S. | Isaro P./Kaliyanda Poonacha N. | 0:2 (65:7, 1:6) | details | 15.04.2026 | ||
| 1/8-finals | Park U./Pearson K. | Uchiyama Y./Watanabe S. | CAN. | details | 08.04.2026 | ||
| Semi-finals | Isaro P./Kaliyanda Poonacha N. | Molchanov D./Watanabe S. | 2:0 (6:3, 6:1) | details | 04.04.2026 | ||
| Quarter-finals | Paulson A./Vrbensky M. | Molchanov D./Watanabe S. | 1:2 (4:6, 6:4, 3:10) | details | 03.04.2026 | ||
| 1/8-finals | Molchanov D./Watanabe S. | Coccioli A./Virgili Berini F. | 2:0 (6:3, 6:2) | details | 02.04.2026 | ||
| 1/8-finals | Jecan M. A./Watanabe S. | Drzewiecki K./Matuszewski P. | 0:2 (5:7, 62:7) | details | 25.03.2026 | ||
| 1/8-finals | Jecan M. A./Watanabe S. | Liutarevich I./Pujol Navarro B. | 0:2 (65:7, 3:6) | details | 18.03.2026 | ||
| 1/8-finals | Latinovic S./Pavlovic L. | Jecan M. A./Watanabe S. | 2:0 (7:5, 6:3) | details | 11.03.2026 | ||
| 1/8-finals | Dev S D P./Sinha N. K. | Vasa E./Watanabe S. | 2:0 (6:4, 6:4) | details | 04.03.2026 | ||
| Semi-finals | Shimizu Y./Watanabe S. | Isaro P./Kaliyanda Poonacha N. | 0:2 (5:7, 64:7) | details | 27.02.2026 | ||
| Quarter-finals | Myneni S./Singh D. | Shimizu Y./Watanabe S. | 0:2 (4:6, 4:6) | details | 26.02.2026 | ||
| 1/8-finals | Dev S D P./Sinha N. K. | Shimizu Y./Watanabe S. | 0:2 (4:6, 62:7) | details | 24.02.2026 | ||
| 1/8-finals | Sweeny D./Watanabe S. | Nam Ji S./Niklas-Salminen P. | 0:2 (67:7, 2:6) | details | 19.02.2026 | ||
| 1/8-finals | Uchiyama Y./Watanabe S. | Delaney Ja./Polmans M. | 1:2 (7:5, 3:6, 4:10) | details | 11.02.2026 | ||
| Quarter-finals | Jung J./Uesugi K. | Shimizu Y./Watanabe S. | 2:1 (3:6, 6:3, 11:9) | details | 05.02.2026 | ||
| 1/8-finals | Romios M. C./Walkin B. | Shimizu Y./Watanabe S. | 1:2 (6:3, 63:7, 8:10) | details | 03.02.2026 | ||
| 1/8-finals | Cukierman D./Jacq G. | Banthia S./Watanabe S. | 2:0 (6:4, 6:2) | details | 14.01.2026 | ||
| 1/8-finals | Dev S D P./Sinha N. K. | Geerts M./Watanabe S. | 2:0 (6:2, 7:5) | details | 07.01.2026 | ||
| Quarter-finals | Isomura K./Shimizu Y. | Uesugi K./Watanabe S. | 2:0 (6:3, 6:4) | details | 20.11.2025 | ||
| 1/8-finals | Hermans M./Veldheer M. | Uesugi K./Watanabe S. | 1:2 (6:4, 5:7, 3:10) | details | 19.11.2025 | ||
| 1/8-finals | Goldhoff G./Winegar T. | Uesugi K./Watanabe S. | 2:1 (7:66, 1:6, 10:7) | details | 12.11.2025 | ||
| Final | Lammons N./Rojer J. | Uesugi K./Watanabe S. | 2:0 (7:64, 7:66) | details | 08.11.2025 | ||
| Semi-finals | Uesugi K./Watanabe S. | Hsieh C./Santillan A. | 2:0 (7:62, 6:4) | details | 07.11.2025 | ||
| Quarter-finals | Alcantara F. C./Castelnuovo L. | Uesugi K./Watanabe S. | 0:2 (3:6, 3:6) | details | 06.11.2025 | ||
| 1/8-finals | Dev S D P./Sinha N. K. | Uesugi K./Watanabe S. | 0:2 (4:6, 64:7) | details | 05.11.2025 | ||
| Quarter-finals | Uesugi K./Watanabe S. | Lammons N./Rojer J. | 1:2 (6:3, 4:6, 4:10) | details | 30.10.2025 | ||
| 1/8-finals | Noguchi R./Wang A. | Uesugi K./Watanabe S. | 1:2 (6:3, 0:6, 5:10) | details | 29.10.2025 | ||
| 1/8-finals | Uesugi K./Watanabe S. | Shimizu Y./Tajima N. | 1:2 (6:4, 3:6, 6:10) | details | 22.10.2025 | ||
| Quarter-finals | Uesugi K./Watanabe S. | Ferreira Silva F./Rocha H. | 0:2 (3:6, 5:7) | details | 16.10.2025 | ||
| 1/8-finals | Uesugi K./Watanabe S. | Bayldon B./Jasika O. | 2:1 (4:6, 6:2, 11:9) | details | 15.10.2025 | ||
| Quarter-finals | Bollipalli R./Kadhe A. | Uesugi K./Watanabe S. | 2:0 (6:3, 6:3) | details | 09.10.2025 | ||
| 1/8-finals | Uesugi K./Watanabe S. | Xiao L./Zhang T. | 2:0 (7:5, 6:2) | details | 08.10.2025 | ||
| Quarter-finals | Harrison C./King E. | Uesugi K./Watanabe S. | 2:1 (3:6, 6:4, 10:2) | details | 27.09.2025 | ||
| 1/8-finals | Uesugi K./Watanabe S. | Krajicek A./Mektic N. | 2:0 (6:4, 6:2) | details | 25.09.2025 | ||