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| 1/16-finals | Ferreira Silva F. | Sakamoto R. | 0:2 (2:6, 2:6) | detalhes | 17.02.2026 | ||
| Semi-finals | Zhang Z. | Sakamoto R. | 2:0 (6:1, 6:4) | detalhes | 14.02.2026 | ||
| Quarter-finals | Sakamoto R. | Tu L. | 2:0 (7:63, 6:4) | detalhes | 13.02.2026 | ||
| 1/8-finals | Sakamoto R. | Sinclair C. | 2:0 (7:5, 6:3) | detalhes | 12.02.2026 | ||
| 1/16-finals | Sakamoto R. | Mochizuki Y. | 2:0 (6:0, 6:1) | detalhes | 10.02.2026 | ||
| Quarter-finals | Sakamoto R. | Schoolkate T. | 0:2 (3:6, 4:6) | detalhes | 06.02.2026 | ||
| 1/8-finals | Sakamoto R. | Daniel T. | 2:0 (7:65, 6:2) | detalhes | 04.02.2026 | ||
| 1/16-finals | Sakamoto R. | Sekulic P. | 2:0 (6:3, 6:4) | detalhes | 02.02.2026 | ||
| 1/64-finals | Sakamoto R. | Jodar R. | 2:3 (66:7, 1:6, 7:5, 6:4, 3:6) | detalhes | 20.01.2026 | ||
| Final | Zeppieri G. | Sakamoto R. | 0:2 (2:6, 2:6) | detalhes | 15.01.2026 | ||
| Semi-finals | Sakamoto R. | Smith C. | 2:0 (6:4, 6:4) | detalhes | 14.01.2026 | ||
| Quarter-finals | Sakamoto R. | Evans D. | 2:0 (6:1, 6:2) | detalhes | 12.01.2026 | ||
| 1/16-finals | Sonego L. | Sakamoto R. | 2:0 (6:2, 7:64) | detalhes | 06.01.2026 | ||
| Final | Uchida K. | Sakamoto R. | 1:2 (6:4, 64:7, 4:6) | detalhes | 23.11.2025 | ||
| Semi-finals | Santillan A. | Sakamoto R. | 1:2 (6:3, 1:6, 3:6) | detalhes | 22.11.2025 | ||
| Quarter-finals | Uchiyama Y. | Sakamoto R. | 1:2 (6:3, 3:6, 4:6) | detalhes | 21.11.2025 | ||
| 1/8-finals | Zhukov M. | Sakamoto R. | 0:2 (1:6, 2:6) | detalhes | 19.11.2025 | ||
| 1/16-finals | Samrej K. | Sakamoto R. | 0:2 (4:6, 61:7) | detalhes | 18.11.2025 | ||
| Quarter-finals | Tseng C. H. | Sakamoto R. | 2:1 (4:6, 6:1, 7:611) | detalhes | 14.11.2025 | ||
| 1/8-finals | Barton H. | Sakamoto R. | 1:2 (6:3, 3:6, 4:6) | detalhes | 12.11.2025 | ||
| 1/16-finals | Basing M. | Sakamoto R. | 1:2 (66:7, 7:64, 3:6) | detalhes | 11.11.2025 | ||
| Semi-finals | Sakamoto R. | Krajci M. | 0:2 (1:6, 2:6) | detalhes | 26.10.2025 | ||
| 1/16-finals | Malige M. | Sakamoto R. | 2:0 (7:5, 6:1) | detalhes | 20.10.2025 | ||
| Semi-finals | Sakamoto R. | Lajal M. | 0:2 (1:6, 4:6) | detalhes | 11.10.2025 | ||
| 1/64-finals | Arnaldi M. | Sakamoto R. | 2:0 (7:63, 6:4) | detalhes | 02.10.2025 | ||
| Final | McDonald M. | Sakamoto R. | 0:2 (4:6, 3:6) | detalhes | 30.09.2025 | ||
| Semi-finals | Sakamoto R. | Holt B. | 2:0 (6:1, 7:5) | detalhes | 29.09.2025 | ||
| Final | Vukic A. | Sakamoto R. | 2:0 (6:4, 7:65) | detalhes | 23.09.2025 | ||
| Semi-finals | Sakamoto R. | Walton A. | 2:0 (6:2, 6:4) | detalhes | 22.09.2025 | ||
| Semi-finals | Sakamoto R. | Basilashvili N. | 1:2 (2:6, 6:3, 1:6) | detalhes | 16.09.2025 | ||
| Sakamoto R. | Engel J. | 1:2 (3:6, 7:62, 7:10) | detalhes | 13.09.2025 | |||
| Semi-finals | Sakamoto R. | Buse I. | 1:2 (4:6, 6:4, 4:6) | detalhes | 21.08.2025 | ||
| Quarter-finals | Zink T. | Sakamoto R. | 1:2 (6:4, 5:7, 68:7) | detalhes | 20.08.2025 | ||
| 1/16-finals | Bigun K. | Sakamoto R. | 2:0 (6:3, 6:1) | detalhes | 12.08.2025 | ||
| 1/8-finals | Sakamoto R. | Spizzirri E. | 1:1 RET. (65:7, 7:67, 3:4) | detalhes | 01.08.2025 | ||
| 1/16-finals | Ghibaudo A. | Sakamoto R. | 1:2 (6:1, 4:6, 2:6) | detalhes | 29.07.2025 | ||
| 1/16-finals | Spizzirri E. | Sakamoto R. | 2:1 (3:6, 6:3, 6:4) | detalhes | 22.07.2025 | ||
| 1/8-finals | Blockx A. | Sakamoto R. | 2:0 (6:2, 7:5) | detalhes | 10.07.2025 | ||
| 1/16-finals | Nakagawa N. | Sakamoto R. | 1:2 (64:7, 6:2, 3:6) | detalhes | 09.07.2025 | ||
| Final | Sakamoto R. | Draxl L. | 2:0 (6:1, 6:4) | detalhes | 06.07.2025 | ||
| Semi-finals | Sakamoto R. | Kypson P. | 2:0 (7:61, 7:66) | detalhes | 05.07.2025 | ||
| Quarter-finals | Schoolkate T. | Sakamoto R. | 0:2 (62:7, 4:6) | detalhes | 04.07.2025 | ||
| 1/8-finals | Maloney P. | Sakamoto R. | 1:2 (6:3, 1:6, 2:6) | detalhes | 03.07.2025 | ||
| 1/16-finals | Sakamoto R. | Mejia N. | 2:1 (68:7, 6:3, 6:3) | detalhes | 01.07.2025 | ||
| Semi-finals | Blanch Dar./Sakamoto R. | Delaney Ja./Sweeny D. | 0:2 (4:6, 4:6) | detalhes | 06.02.2026 | ||
| Quarter-finals | Blanch Dar./Sakamoto R. | Bolt A./Uchiyama Y. | 2:1 (6:1, 3:6, 10:4) | detalhes | 05.02.2026 | ||
| 1/8-finals | Charlton J./Harper P. | Blanch Dar./Sakamoto R. | 0:2 (66:7, 4:6) | detalhes | 04.02.2026 | ||
| 1/8-finals | Reynolds F./Watt J. | Sakamoto R./Uchiyama Y. | 2:0 (6:1, 6:4) | detalhes | 12.11.2025 | ||
| Semi-finals | Mochizuki S./Sakamoto R. | Borges N./Matos R. | 1:2 (61:7, 7:65, 8:10) | detalhes | 23.09.2025 | ||
| 1/8-finals | Mochizuki S./Sakamoto R. | Chandrasekar A./Ramanathan R. | CAN. | detalhes | 23.07.2025 | ||