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| Semi-finals | Krutykh O. | Ostapenkov D. | 2:0 (6:4, 6:3) | dettagli | 26.04.2026 | ||
| Quarter-finals | Skatov T. | Ostapenkov D. | 2:1 (64:7, 7:65, 6:4) | dettagli | 23.04.2026 | ||
| 1/8-finals | Ostapenkov D. | Gadamauri B. | 2:1 (6:2, 4:6, 6:4) | dettagli | 22.04.2026 | ||
| 1/16-finals | Ostapenkov D. | Pieri S. | 2:1 (6:4, 5:7, 7:66) | dettagli | 21.04.2026 | ||
| Final | La Vela G. | Ostapenkov D. | 1:2 (7:65, 62:7, 2:6) | dettagli | 20.04.2026 | ||
| Semi-finals | Shin M. | Ostapenkov D. | 0:2 (1:6, 4:6) | dettagli | 19.04.2026 | ||
| 1/16-finals | Ostapenkov D. | Fomin S. | 0:2 (3:6, 4:6) | dettagli | 15.04.2026 | ||
| Final | Ostapenkov D. | Kikuchi Y. | 2:0 (6:2, 6:2) | dettagli | 13.04.2026 | ||
| Semi-finals | Matsuda R. | Ostapenkov D. | 0:2 (61:7, 4:6) | dettagli | 12.04.2026 | ||
| 1/8-finals | Ostapenkov D. | Simakin I. | 0:2 (3:6, 3:6) | dettagli | 08.04.2026 | ||
| 1/16-finals | Ostapenkov D. | Sun Qian | 2:0 (7:63, 6:4) | dettagli | 07.04.2026 | ||
| Final | Ostapenkov D. | Park U. | 2:0 (6:2, 6:4) | dettagli | 06.04.2026 | ||
| Semi-finals | Peliwo F. | Ostapenkov D. | CAN. | dettagli | 05.04.2026 | ||
| 1/16-finals | Ostapenkov D. | Santillan A. | 0:2 (67:7, 2:6) | dettagli | 01.04.2026 | ||
| Final | Matsuoka H. | Ostapenkov D. | 1:1 CAN. (3:6, 6:4, 1:2) | dettagli | 04.03.2026 | ||
| Semi-finals | Ostapenkov D. | Matsuda R. | 2:1 (6:1, 4:6, 6:3) | dettagli | 02.03.2026 | ||
| 1/16-finals | Mikovic M. | Ostapenkov D. | 1:0 RET. (7:64, 0:0) | dettagli | 25.02.2026 | ||
| 1/8-finals | Borg L. | Ostapenkov D. | 2:0 (6:4, 6:4) | dettagli | 19.02.2026 | ||
| 1/16-finals | Ostapenkov D. | Castagnola L. | 2:0 (7:68, 6:1) | dettagli | 18.02.2026 | ||
| Semi-finals | Albot R. | Ostapenkov D. | 2:1 (4:6, 6:2, 6:3) | dettagli | 18.01.2026 | ||
| Semi-finals | Binda A. | Ostapenkov D. | 2:0 (6:4, 6:4) | dettagli | 17.01.2026 | ||
| Quarter-finals | McKennon M. | Ostapenkov D. | 0:2 (4:6, 4:6) | dettagli | 16.01.2026 | ||
| 1/8-finals | Ostapenkov D. | Bakshi A. | 2:0 (7:61, 6:4) | dettagli | 15.01.2026 | ||
| 1/16-finals | Ostapenkov D. | Gerasimov E. | 2:0 (6:2, 6:4) | dettagli | 14.01.2026 | ||
| Quarter-finals | Bakshi A. | Ostapenkov D. | 2:0 (7:66, 6:4) | dettagli | 09.01.2026 | ||
| 1/8-finals | Eichenseher D. | Ostapenkov D. | 0:2 (3:6, 2:6) | dettagli | 08.01.2026 | ||
| 1/16-finals | Parizzia N. | Ostapenkov D. | 0:1 RET. (2:6, 0:2) | dettagli | 07.01.2026 | ||
| 1/8-finals | Betov S./Ostapenkov D. | Albot R./Yevseyev D. | 0:2 (4:6, 64:7) | dettagli | 22.04.2026 | ||
| Quarter-finals | Smith K./Zheng B. | Betov S./Ostapenkov D. | 2:0 (6:2, 6:4) | dettagli | 17.04.2026 | ||
| 1/8-finals | Betov S./Ostapenkov D. | Dev S D P./Wang A. | 2:1 (7:65, 4:6, 10:4) | dettagli | 15.04.2026 | ||
| Semi-finals | Betov S./Ostapenkov D. | Charlton J./Jones B. | 1:2 (4:6, 6:3, 7:10) | dettagli | 10.04.2026 | ||
| Quarter-finals | Betov S./Ostapenkov D. | Cook E./Sach T. | 2:0 (6:3, 6:3) | dettagli | 09.04.2026 | ||
| 1/8-finals | Betov S./Ostapenkov D. | Tajima N./Uchida K. | 2:1 (6:1, 5:7, 10:2) | dettagli | 08.04.2026 | ||
| Quarter-finals | Fomin S./Lomakin G. | Ostapenkov D./Zhu M. | 2:0 (6:3, 6:1) | dettagli | 02.04.2026 | ||
| 1/8-finals | Hsieh C./Yang M. | Ostapenkov D./Zhu M. | 1:2 (6:3, 5:7, 8:10) | dettagli | 31.03.2026 | ||
| 1/8-finals | Chopra K./Lopez Morillo I. | Betov S./Ostapenkov D. | CAN. | dettagli | 04.03.2026 | ||
| 1/8-finals | Betov S./Ostapenkov D. | Becroft I./Shepp A. | 0:2 (3:6, 1:6) | dettagli | 25.02.2026 | ||
| Quarter-finals | Betov S./Ostapenkov D. | Omarkhanov A./Sciahbasi M. | 0:2 (4:6, 1:6) | dettagli | 19.02.2026 | ||
| 1/8-finals | Betov S./Ostapenkov D. | De Carvalho V./Rivet M. | 2:0 (6:4, 7:5) | dettagli | 17.02.2026 | ||
| 1/8-finals | Westphal M./Winegar T. | Betov S./Ostapenkov D. | 2:0 (6:4, 6:2) | dettagli | 21.01.2026 | ||
| Final | Betov S./Ostapenkov D. | Ozdemir S. M./Turker M. N. | 0:2 (65:7, 5:7) | dettagli | 17.01.2026 | ||
| Semi-finals | Betov S./Ostapenkov D. | Copil M./Purtseladze S. | 2:0 (7:64, 6:3) | dettagli | 16.01.2026 | ||
| Quarter-finals | Betov S./Ostapenkov D. | McDonald N./Zakaria F. | 2:0 (6:4, 6:2) | dettagli | 15.01.2026 | ||
| 1/8-finals | Betov S./Ostapenkov D. | Gerasimov E./Kivattsev K. | 2:0 (7:64, 6:4) | dettagli | 13.01.2026 | ||
| Final | Ozdemir S. M./Turker M. N. | Gerasimov E./Ostapenkov D. | 2:1 (3:6, 7:68, 10:4) | dettagli | 10.01.2026 | ||
| Semi-finals | McKennon M./Rocha F. | Gerasimov E./Ostapenkov D. | 0:2 (4:6, 64:7) | dettagli | 09.01.2026 | ||
| Quarter-finals | Bakshi A./Tkemaladze Z. | Gerasimov E./Ostapenkov D. | WO. | dettagli | 08.01.2026 | ||
| 1/8-finals | Jiang F./Sun Z. | Gerasimov E./Ostapenkov D. | 1:2 (6:3, 4:6, 0:10) | dettagli | 06.01.2026 | ||
| Final | Bassem Sobhy M./Zakaria F. | Betov S./Ostapenkov D. | 0:2 (4:6, 2:6) | dettagli | 22.11.2025 | ||
| Semi-finals | Betov S./Ostapenkov D. | Simakin I./Verbin P. | 2:1 (6:2, 3:6, 11:9) | dettagli | 21.11.2025 | ||