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| Final | Ostapenkov D. | Kikuchi Y. | 2:0 (6:2, 6:2) | dettagli | 13.04.2026 | ||
| Semi-finals | Sun Qian | Kikuchi Y. | 0:2 (5:7, 3:6) | dettagli | 12.04.2026 | ||
| Final | Nam Ji S. | Kikuchi Y. | 2:0 (6:4, 6:4) | dettagli | 30.03.2026 | ||
| Semi-finals | Kikuchi Y. | Matsuda R. | 2:0 (6:3, 6:2) | dettagli | 29.03.2026 | ||
| 1/8-finals | Hazawa S. | Kikuchi Y. | 2:1 (6:4, 4:6, 6:4) | dettagli | 27.03.2026 | ||
| 1/16-finals | Kikuchi Y. | Nakagawa N. | 2:1 (6:3, 2:6, 6:4) | dettagli | 24.03.2026 | ||
| 1/8-finals | Kikuchi Y. | Overbeck C. E. | 0:2 (4:6, 2:6) | dettagli | 19.03.2026 | ||
| 1/16-finals | Kikuchi Y. | Tomida Y. | 2:1 (64:7, 6:3, 6:4) | dettagli | 18.03.2026 | ||
| Semi-finals | Heck H. | Kikuchi Y. | 2:0 (6:4, 6:2) | dettagli | 14.03.2026 | ||
| Quarter-finals | Tabata R. | Kikuchi Y. | 0:2 (4:6, 1:6) | dettagli | 13.03.2026 | ||
| 1/8-finals | Hazawa S. | Kikuchi Y. | 0:2 (62:7, 5:7) | dettagli | 12.03.2026 | ||
| 1/16-finals | Kikuchi Y. | Kumasaka T. | 2:0 (6:0, 7:66) | dettagli | 10.03.2026 | ||
| 1/16-finals | Yazdani A. | Kikuchi Y. | 2:0 (6:2, 6:4) | dettagli | 17.02.2026 | ||
| Semi-finals | Kikuchi Y. | Colson T. | 0:2 (0:6, 1:6) | dettagli | 04.01.2026 | ||
| Final | Kikuchi Y. | Taguchi R. | 1:2 (6:4, 3:6, 3:6) | dettagli | 17.11.2025 | ||
| Semi-finals | Kikuchi Y. | Uesugi K. | 2:1 (0:6, 6:2, 6:2) | dettagli | 16.11.2025 | ||
| Final | Kikuchi Y. | Nakagawa S. | 0:2 (3:6, 5:7) | dettagli | 03.11.2025 | ||
| Semi-finals | Kikuchi Y. | Tabata R. | 2:0 (6:0, 6:4) | dettagli | 02.11.2025 | ||
| Final | Sultanov K. | Kikuchi Y. | 2:0 (6:2, 6:4) | dettagli | 20.10.2025 | ||
| Semi-finals | Kikuchi Y. | Palan D. | 2:0 (6:3, 6:4) | dettagli | 20.10.2025 | ||
| Semi-finals | Dev S D P. | Kikuchi Y. | 2:1 (6:4, 3:6, 6:3) | dettagli | 12.10.2025 | ||
| Semi-finals | Kikuchi Y. | Shin S. | 1:2 (6:3, 1:6, 2:6) | dettagli | 22.09.2025 | ||
| 1/16-finals | Takahashi Y. | Kikuchi Y. | 2:0 (6:3, 6:0) | dettagli | 16.09.2025 | ||
| 1/16-finals | Kikuchi Y. | Hsu Y. H. | 1:2 (6:4, 3:6, 3:6) | dettagli | 09.09.2025 | ||
| Final | Liu H. | Kikuchi Y. | 0:2 (4:6, 3:6) | dettagli | 08.09.2025 | ||
| Semi-finals | Zeng Y. | Kikuchi Y. | 0:2 (3:6, 63:7) | dettagli | 08.09.2025 | ||
| Quarter-finals | Sim S. | Kikuchi Y. | 2:0 (6:4, 6:4) | dettagli | 05.09.2025 | ||
| 1/8-finals | Vardhan V. | Kikuchi Y. | 0:2 (2:6, 1:6) | dettagli | 04.09.2025 | ||
| 1/16-finals | Sun Z. | Kikuchi Y. | 1:2 (0:6, 6:4, 4:6) | dettagli | 02.09.2025 | ||
| 1/16-finals | Uchiyama Y. | Kikuchi Y. | 2:1 (6:2, 5:7, 6:1) | dettagli | 26.08.2025 | ||
| Final | Chen C. | Kikuchi Y. | 0:2 (4:6, 3:6) | dettagli | 25.08.2025 | ||
| Semi-finals | Tajima N. | Kikuchi Y. | 0:2 (3:6, 5:7) | dettagli | 24.08.2025 | ||
| Final | Kikuchi Y. | Sun Qian | 2:0 (6:1, 6:4) | dettagli | 10.08.2025 | ||
| Semi-finals | Kikuchi Y. | Mo Y. C. | 2:0 (6:3, 6:4) | dettagli | 09.08.2025 | ||
| Quarter-finals | Shin S. | Kikuchi Y. | 1:2 (2:6, 6:2, 62:7) | dettagli | 08.08.2025 | ||
| 1/8-finals | Meng F. | Kikuchi Y. | 0:2 (1:6, 2:6) | dettagli | 07.08.2025 | ||
| 1/16-finals | Sun Z. | Kikuchi Y. | 0:2 (1:6, 0:6) | dettagli | 06.08.2025 | ||
| Final | Kikuchi Y. | Lee D. H. | 0:2 (3:6, 3:6) | dettagli | 03.08.2025 | ||
| 1/8-finals | Kikuchi Y./Shiraishi H. | Krall L./Zamora N. | 0:2 (4:6, 3:6) | dettagli | 24.03.2026 | ||
| Quarter-finals | Kikuchi Y./Takahata R. | Hazawa S./Imamura M. | 1:2 (62:7, 6:3, 10:12) | dettagli | 12.03.2026 | ||
| 1/8-finals | Nefve A./Zamora N. | Kikuchi Y./Takahata R. | 0:2 (5:7, 4:6) | dettagli | 11.03.2026 | ||
| Quarter-finals | Milev Y./Popovic S. | Kikuchi Y./Yazdani A. | 2:0 (6:3, 6:2) | dettagli | 14.02.2026 | ||
| 1/8-finals | Kikuchi Y./Yazdani A. | Apostol C./Tomescu D. A. | 2:1 (4:6, 7:60, 10:6) | dettagli | 10.02.2026 | ||
| 1/8-finals | Reynolds F./Watt J. | Kikuchi Y./Sueoka Y. | 2:0 (6:3, 6:2) | dettagli | 05.11.2025 | ||
| 1/8-finals | Chandrasekar A./Stalder R. | Inui Y./Kikuchi Y. | 2:1 (7:5, 3:6, 10:5) | dettagli | 11.09.2025 | ||
| Quarter-finals | Inui Y./Kikuchi Y. | Cho Seung Woo/Yang Z. | 0:2 (4:6, 65:7) | dettagli | 04.09.2025 | ||
| 1/8-finals | Inui Y./Kikuchi Y. | Ianin N./Park S. | 2:0 (6:3, 7:63) | dettagli | 03.09.2025 | ||
| Semi-finals | Kikuchi Y./Sun Qian | Inui Y./Ochi M. | 0:2 (3:6, 4:6) | dettagli | 08.08.2025 | ||
| Quarter-finals | Kikuchi Y./Sun Qian | Liu S./Lu P. | 2:0 (6:2, 6:1) | dettagli | 07.08.2025 | ||
| 1/8-finals | Kikuchi Y./Sun Qian | Mo Y. C./Wang X. | 2:0 (7:63, 7:5) | dettagli | 05.08.2025 | ||