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| Semi-finals | Kypson P. | Kozlov S. | 2:0 (7:63, 6:0) | detalhes | 22.02.2026 | ||
| Quarter-finals | Kozlov S. | Pacheco Mendez R. | 0:2 (4:6, 2:6) | detalhes | 20.02.2026 | ||
| 1/8-finals | Kozlov S. | Poling K. | 2:0 (6:4, 7:64) | detalhes | 18.02.2026 | ||
| 1/16-finals | Kozlov S. | McCormick T. | 2:1 (6:3, 64:7, 6:4) | detalhes | 16.02.2026 | ||
| 1/16-finals | Dostanic S. | Kozlov S. | CAN. | detalhes | 10.02.2026 | ||
| Quarter-finals | Kozlov S. | Smith K. | 0:2 (3:6, 2:6) | detalhes | 06.02.2026 | ||
| 1/8-finals | Kozlov S. | Perot R. | 2:1 (7:65, 3:6, 6:3) | detalhes | 04.02.2026 | ||
| 1/16-finals | Kozlov S. | Stebe C. | 2:1 (3:6, 6:2, 6:3) | detalhes | 02.02.2026 | ||
| 1/16-finals | Shimabukuro S. | Kozlov S. | 2:1 (6:2, 4:6, 7:65) | detalhes | 28.01.2026 | ||
| 1/8-finals | Kozlov S. | Passaro F. | 1:2 (3:6, 6:1, 1:6) | detalhes | 22.01.2026 | ||
| 1/16-finals | Galarneau A. | Kozlov S. | 1:2 (62:7, 6:2, 1:6) | detalhes | 20.01.2026 | ||
| Final | Kozlov S. | Kukushkin M. | 2:0 (6:4, 6:2) | detalhes | 19.01.2026 | ||
| Semi-finals | Kozlov S. | Strombachs R. | 1:0 RET. (6:3, 5:0) | detalhes | 18.01.2026 | ||
| 1/16-finals | Wendelken H. | Kozlov S. | 2:1 (6:1, 3:6, 6:4) | detalhes | 13.01.2026 | ||
| Quarter-finals | Kozlov S. | Samuel T. | 0:2 (61:7, 4:6) | detalhes | 08.01.2026 | ||
| 1/8-finals | Kozlov S. | Erhard M. | 2:0 (6:2, 6:4) | detalhes | 07.01.2026 | ||
| 1/16-finals | Kozlov S. | Zink T. | 2:0 (6:4, 6:1) | detalhes | 06.01.2026 | ||
| Quarter-finals | Gomez J. S. | Kozlov S. | 2:1 (4:6, 6:4, 7:5) | detalhes | 28.11.2025 | ||
| 1/8-finals | Jorda Sanchis D. | Kozlov S. | 0:2 (4:6, 4:6) | detalhes | 27.11.2025 | ||
| 1/16-finals | Torres J. B. | Kozlov S. | 1:2 (0:6, 6:4, 3:6) | detalhes | 25.11.2025 | ||
| 1/16-finals | Habib H. | Kozlov S. | CAN. | detalhes | 18.11.2025 | ||
| Final | Kozlov S. | Cassone M. | 2:0 (7:63, 7:5) | detalhes | 16.11.2025 | ||
| Semi-finals | Stebe C. | Kozlov S. | 0:1 RET. (0:6, 0:4) | detalhes | 15.11.2025 | ||
| Quarter-finals | Blanch Dar. | Kozlov S. | 1:2 (2:6, 7:67, 3:6) | detalhes | 15.11.2025 | ||
| 1/8-finals | Kozlov S. | Zink T. | 2:0 (6:3, 6:3) | detalhes | 13.11.2025 | ||
| 1/16-finals | Kozlov S. | Borg L. | 2:0 (6:1, 6:0) | detalhes | 11.11.2025 | ||
| 1/8-finals | Kozlov S. | Clarke J. | 1:2 (2:6, 6:2, 3:6) | detalhes | 05.11.2025 | ||
| 1/16-finals | Kozlov S. | Rolland D. | 2:1 (7:61, 2:6, 6:1) | detalhes | 03.11.2025 | ||
| Final | Kozlov S. | Huang T. | 1:2 (6:1, 5:7, 2:6) | detalhes | 04.08.2025 | ||
| Semi-finals | Kozlov S. | Ramanathan R. | 1:1 RET. (6:1, 64:7, 5:3) | detalhes | 03.08.2025 | ||
| 1/16-finals | Krueger M. | Kozlov S. | 2:1 (6:1, 3:6, 6:1) | detalhes | 07.07.2025 | ||
| Final | Kozlov S. | Tudorica A. N. | 0:2 (5:7, 3:6) | detalhes | 02.06.2025 | ||
| Semi-finals | Kozlov S. | Milavsky D. | 2:1 (6:3, 67:7, 6:3) | detalhes | 02.06.2025 | ||
| 1/8-finals | Andrade A. | Kozlov S. | 2:1 (6:1, 4:6, 7:5) | detalhes | 29.05.2025 | ||
| 1/16-finals | Kozlov S. | Dougaz A. | 2:1 (5:7, 6:3, 6:2) | detalhes | 28.05.2025 | ||
| Final | Kozlov S. | Ejupovic E. | 2:0 (6:4, 7:65) | detalhes | 28.05.2025 | ||
| Semi-finals | Kozlov S. | Pannu K. | 2:1 (7:63, 2:6, 6:2) | detalhes | 27.05.2025 | ||
| Final | Rodriguez Taverna S. | Kozlov S. | 1:2 (7:64, 4:6, 4:6) | detalhes | 18.05.2025 | ||
| Semi-finals | Kozlov S. | McKennon M. | 2:1 (2:6, 6:1, 6:4) | detalhes | 18.05.2025 | ||
| Quarter-finals | Kozlov S. | Mayo A. | 2:0 (6:4, 6:4) | detalhes | 17.05.2025 | ||
| 1/8-finals | Kozlov S. | Nefve A. | 2:0 (6:4, 6:4) | detalhes | 15.05.2025 | ||
| Semi-finals | Kingsley C./Maginley J. | Kozlov S./Perez B. | 2:0 (6:3, 6:4) | detalhes | 06.02.2026 | ||
| Quarter-finals | Bianchi J. J./Milavsky D. | Kozlov S./Perez B. | 1:2 (4:6, 6:4, 9:11) | detalhes | 05.02.2026 | ||
| 1/8-finals | Kozlov S./Perez B. | Kumar P./Schachter N. | 2:1 (3:6, 6:2, 10:6) | detalhes | 05.02.2026 | ||
| 1/8-finals | Goldhoff G./Stalder R. | Kozlov S./Tomic B. | 2:1 (3:6, 6:3, 10:5) | detalhes | 28.01.2026 | ||
| 1/8-finals | Escobar G./Reyes-Varela M. A. | Kozlov S./Rodriguez Taverna S. | 2:0 (6:4, 6:2) | detalhes | 26.11.2025 | ||
| 1/8-finals | Kozlov S./McCormick T. | Hernandez A./Pacheco Mendez R. | CAN. | detalhes | 19.11.2025 | ||
| 1/8-finals | Kozlov S./Perez B. | Harper P./Mitsui S. | 1:2 (6:4, 3:6, 5:10) | detalhes | 12.11.2025 | ||
| 1/8-finals | Kozlov B./Kozlov S. | Krueger M./Maginley J. | 0:2 (4:6, 3:6) | detalhes | 06.11.2025 | ||
| 1/8-finals | Goldhoff G./Hilderbrand T. | Kozlov S./Vance J. | 2:0 (6:3, 6:1) | detalhes | 05.06.2025 | ||