Tunisia: W15 Monastir 38 - Singles - Main |
| 1/16-finals | Wawrzkiewicz I. | Szostak M. | 2:1 (6:4, 2:6, 6:4) | details | 05.11.2025 |
France: W75 Poitiers - Singles - Main |
| 1/16-finals | Szostak M. | Martynov D. | 1:2 (6:2, 3:6, 62:7) | details | 21.10.2025 |
France: W50 Cherbourg-en-Cotentin - Singles - Main |
| 1/8-finals | Leonard M. | Szostak M. | 2:0 (6:1, 6:4) | details | 16.10.2025 |
| 1/16-finals | Baslilar S. | Szostak M. | 0:2 (5:7, 2:6) | details | 15.10.2025 |
France: W35 Reims - Singles - Main |
| 1/8-finals | Szostak M. | Van Emst S. | 0:2 (3:6, 4:6) | details | 02.10.2025 |
| 1/16-finals | Duerst J. | Szostak M. | 1:2 (6:2, 4:6, 4:6) | details | 30.09.2025 |
France: W75 Le Neubourg - Singles - Main |
| 1/8-finals | Szostak M. | Rouvroy M. | 0:1 RET. (5:7, 0:1) | details | 11.09.2025 |
| 1/16-finals | Akli A. | Szostak M. | 1:2 (6:2, 4:6, 1:6) | details | 09.09.2025 |
France: W50 Saint-Palais-sur-Mer - Singles - Main |
| Quarter-finals | Szostak M. | Hennemann C. W. | 1:2 (3:6, 7:5, 2:6) | details | 05.09.2025 |
| 1/8-finals | Diaz Adrover C. | Szostak M. | 0:2 (0:6, 1:6) | details | 04.09.2025 |
| 1/16-finals | Szostak M. | Urgesi F. | 2:1 (3:6, 6:3, 7:67) | details | 03.09.2025 |
Tunisia: W15 Monastir 29 - Singles - Main |
| 1/8-finals | Szostak M. | Jialin T. | 0:2 (1:6, 1:6) | details | 14.08.2025 |
| 1/16-finals | Szostak M. | Lo Pumo M. | 2:0 (6:1, 6:0) | details | 13.08.2025 |
Tunisia: W15 Monastir 28 - Singles - Main |
| 1/8-finals | Karunaratne A. | Szostak M. | 2:1 (6:4, 5:7, 6:2) | details | 07.08.2025 |
| 1/16-finals | Grignac C. | Szostak M. | 0:2 (2:6, 1:6) | details | 06.08.2025 |
France: W15 Bissy-Chambery - Singles - Main |
| 1/8-finals | Boullay O. | Szostak M. | 2:0 (7:5, 6:3) | details | 03.07.2025 |
| 1/16-finals | Williamson A. | Szostak M. | 0:2 (2:6, 4:6) | details | 02.07.2025 |
France: W75 Blois - Singles - Main |
| 1/16-finals | Szostak M. | Rame A. | 0:2 (1:6, 1:6) | details | 17.06.2025 |
France: W15 Norges-la-Ville - Singles - Main |
| 1/16-finals | Mincheva V. | Szostak M. | 2:0 (6:4, 7:63) | details | 11.06.2025 |
Spain: W15 Castellon - Vall d’Uxo - Singles - Main |
| 1/8-finals | Szostak M. | Gonzalez Vilar R. | 0:2 (68:7, 3:6) | details | 29.05.2025 |
| 1/16-finals | Szostak M. | Ros Parres L. | 2:1 (4:6, 6:3, 6:3) | details | 28.05.2025 |
Spain: W35 Platja D'Aro - Singles - Main |
| 1/8-finals | Steur J. L. S. | Szostak M. | 2:0 (6:0, 6:3) | details | 08.05.2025 |
| 1/16-finals | Szostak M. | Vedder E. | 0:1 RET. (64:7, 4:2, 0:0) | details | 07.05.2025 |
Spain: W50 Yecla - Singles - Main |
| 1/8-finals | Szostak M. | Hruncakova V. | 0:2 (3:6, 0:6) | details | 01.05.2025 |
| 1/16-finals | Szostak M. | Giessler E. G. | 2:0 (6:1, 6:0) | details | 29.04.2025 |
France: W75 Calvi - Singles - Main |
| 1/8-finals | Szostak M. | Costoulas S. | 0:2 (3:6, 4:6) | details | 18.04.2025 |
| 1/16-finals | Reguer A. | Szostak M. | 0:2 (64:7, 0:6) | details | 17.04.2025 |
Thailand: W15 Nonthaburi 2 - Singles - Main |
| 1/16-finals | Chanta A. | Szostak M. | 2:0 (6:1, 6:2) | details | 26.03.2025 |
Thailand: W15 Nonthaburi - Singles - Main |
| Semi-finals | Chanta A. | Szostak M. | 2:0 (6:4, 6:1) | details | 22.03.2025 |
| Quarter-finals | De Zeeuw J. | Szostak M. | 0:2 (4:6, 2:6) | details | 21.03.2025 |
| 1/8-finals | Szostak M. | Lee E. | 2:0 (7:62, 6:1) | details | 20.03.2025 |
| 1/16-finals | Ahn Y. J. | Szostak M. | 0:2 (0:6, 1:6) | details | 19.03.2025 |
Thailand: W35 Nonthaburi - Singles - Main |
| 1/8-finals | Lee E. | Szostak M. | 2:1 (6:3, 64:7, 6:3) | details | 13.03.2025 |
| 1/16-finals | Plipuech P. | Szostak M. | 0:2 (4:6, 4:6) | details | 12.03.2025 |
Germany: W15 Leimen - Singles - Main |
| 1/16-finals | Herrmann S. | Szostak M. | 2:1 (6:4, 3:6, 7:65) | details | 25.02.2025 |