Select tournament type
| Final | Sanchez Quilez A. | Kozlov S. | 2:0 (7:5, 6:4) | details | 12.05.2026 | ||
| Semi-finals | Mansilla Diez M. | Kozlov S. | 0:2 (2:6, 1:6) | details | 11.05.2026 | ||
| 1/8-finals | Kozlov S. | Hardt N. | 1:2 (2:6, 6:2, 0:6) | details | 22.04.2026 | ||
| 1/16-finals | Glinka D. | Kozlov S. | 0:2 (2:6, 3:6) | details | 20.04.2026 | ||
| 1/16-finals | Kozlov S. | Rybakov A. | 0:2 (63:7, 2:6) | details | 14.04.2026 | ||
| Final | Kozlov S. | Feldbausch K. | 2:1 (6:1, 4:6, 7:62) | details | 13.04.2026 | ||
| Semi-finals | Kozlov S. | Kirchheimer S. | 2:0 (6:0, 6:4) | details | 12.04.2026 | ||
| 1/8-finals | Duckworth J. | Kozlov S. | 2:0 (6:3, 6:2) | details | 09.04.2026 | ||
| 1/16-finals | Perot R. | Kozlov S. | 0:2 (3:6, 1:6) | details | 07.04.2026 | ||
| 1/16-finals | Kozlov S. | Magadan A. | 0:2 (3:6, 67:7) | details | 01.04.2026 | ||
| 1/16-finals | Kozlov S. | Martin A. | 0:2 (2:6, 2:6) | details | 24.03.2026 | ||
| 1/8-finals | Kozlov S. | Mmoh M. | 0:2 (5:7, 2:6) | details | 19.03.2026 | ||
| 1/16-finals | Kozlov S. | Magadan A. | 2:0 (6:4, 6:4) | details | 17.03.2026 | ||
| 1/16-finals | Hara Friend J. D. | Kozlov S. | 2:1 (6:2, 4:6, 6:3) | details | 11.03.2026 | ||
| Final | Kozlov S. | Polmans M. | 2:1 (6:1, 3:6, 6:4) | details | 10.03.2026 | ||
| Semi-finals | Kozlov S. | Ponwith N. | 2:0 (7:5, 6:4) | details | 09.03.2026 | ||
| Semi-finals | Kypson P. | Kozlov S. | 2:0 (7:63, 6:0) | details | 22.02.2026 | ||
| Quarter-finals | Kozlov S. | Pacheco Mendez R. | 0:2 (4:6, 2:6) | details | 20.02.2026 | ||
| 1/8-finals | Kozlov S. | Poling K. | 2:0 (6:4, 7:64) | details | 18.02.2026 | ||
| 1/16-finals | Kozlov S. | McCormick T. | 2:1 (6:3, 64:7, 6:4) | details | 16.02.2026 | ||
| 1/16-finals | Dostanic S. | Kozlov S. | CAN. | details | 10.02.2026 | ||
| Quarter-finals | Kozlov S. | Smith K. | 0:2 (3:6, 2:6) | details | 06.02.2026 | ||
| 1/8-finals | Kozlov S. | Perot R. | 2:1 (7:65, 3:6, 6:3) | details | 04.02.2026 | ||
| 1/16-finals | Kozlov S. | Stebe C. | 2:1 (3:6, 6:2, 6:3) | details | 02.02.2026 | ||
| 1/16-finals | Shimabukuro S. | Kozlov S. | 2:1 (6:2, 4:6, 7:65) | details | 28.01.2026 | ||
| 1/8-finals | Kozlov S. | Passaro F. | 1:2 (3:6, 6:1, 1:6) | details | 22.01.2026 | ||
| 1/16-finals | Galarneau A. | Kozlov S. | 1:2 (62:7, 6:2, 1:6) | details | 20.01.2026 | ||
| Final | Kozlov S. | Kukushkin M. | 2:0 (6:4, 6:2) | details | 19.01.2026 | ||
| Semi-finals | Kozlov S. | Strombachs R. | 1:0 RET. (6:3, 5:0) | details | 18.01.2026 | ||
| 1/16-finals | Wendelken H. | Kozlov S. | 2:1 (6:1, 3:6, 6:4) | details | 13.01.2026 | ||
| Quarter-finals | Kozlov S. | Samuel T. | 0:2 (61:7, 4:6) | details | 08.01.2026 | ||
| 1/8-finals | Kozlov S. | Erhard M. | 2:0 (6:2, 6:4) | details | 07.01.2026 | ||
| 1/16-finals | Kozlov S. | Zink T. | 2:0 (6:4, 6:1) | details | 06.01.2026 | ||
| Quarter-finals | Gomez J. S. | Kozlov S. | 2:1 (4:6, 6:4, 7:5) | details | 28.11.2025 | ||
| 1/8-finals | Jorda Sanchis D. | Kozlov S. | 0:2 (4:6, 4:6) | details | 27.11.2025 | ||
| 1/16-finals | Torres J. B. | Kozlov S. | 1:2 (0:6, 6:4, 3:6) | details | 25.11.2025 | ||
| 1/16-finals | Habib H. | Kozlov S. | CAN. | details | 18.11.2025 | ||
| Final | Kozlov S. | Cassone M. | 2:0 (7:63, 7:5) | details | 16.11.2025 | ||
| Semi-finals | Stebe C. | Kozlov S. | 0:1 RET. (0:6, 0:4) | details | 15.11.2025 | ||
| Quarter-finals | Blanch Dar. | Kozlov S. | 1:2 (2:6, 7:67, 3:6) | details | 15.11.2025 | ||
| 1/8-finals | Kozlov S./Perez B. | Kiger M./Stalder R. | 1:2 (3:6, 7:5, 6:10) | details | 13.05.2026 | ||
| Quarter-finals | Harper C./Stevenson D. | Kozlov B./Kozlov S. | 2:0 (6:2, 7:5) | details | 23.04.2026 | ||
| 1/8-finals | Kozlov B./Kozlov S. | Magadan A./Roncadelli F. | WO. | details | 22.04.2026 | ||
| 1/8-finals | Kozlov S./Martin A. | Delaney Ja./Polmans M. | CAN. | details | 18.03.2026 | ||
| Semi-finals | Kingsley C./Maginley J. | Kozlov S./Perez B. | 2:0 (6:3, 6:4) | details | 06.02.2026 | ||
| Quarter-finals | Bianchi J. J./Milavsky D. | Kozlov S./Perez B. | 1:2 (4:6, 6:4, 9:11) | details | 05.02.2026 | ||
| 1/8-finals | Kozlov S./Perez B. | Kumar P./Schachter N. | 2:1 (3:6, 6:2, 10:6) | details | 05.02.2026 | ||
| 1/8-finals | Goldhoff G./Stalder R. | Kozlov S./Tomic B. | 2:1 (3:6, 6:3, 10:5) | details | 28.01.2026 | ||
| 1/8-finals | Escobar G./Reyes-Varela M. A. | Kozlov S./Rodriguez Taverna S. | 2:0 (6:4, 6:2) | details | 26.11.2025 | ||
| 1/8-finals | Kozlov S./McCormick T. | Hernandez A./Pacheco Mendez R. | CAN. | details | 19.11.2025 | ||