Select tournament type
| 1/8-finals | Pieri T. | Costoulas S. | 0:1 RET. (1:6, 2:3) | details | 03.06.2026 | ||
| 1/16-finals | Sakellaridi S. | Costoulas S. | 1:2 (4:6, 6:2, 3:6) | details | 01.06.2026 | ||
| 1/8-finals | Podoroska N. | Costoulas S. | 2:1 (3:6, 6:0, 7:65) | details | 28.05.2026 | ||
| 1/16-finals | Mikulskyte J. | Costoulas S. | 0:2 (0:6, 3:6) | details | 27.05.2026 | ||
| Final | Guo H. | Costoulas S. | 2:0 (6:3, 6:4) | details | 21.05.2026 | ||
| Semi-finals | Costoulas S. | Hontama M. | 2:0 (6:4, 6:3) | details | 20.05.2026 | ||
| Quarter-finals | Costoulas S. | Mrdeza T. | 2:0 (6:0, 6:2) | details | 18.05.2026 | ||
| 1/16-finals | Pridankina E. | Costoulas S. | CAN. | details | 05.05.2026 | ||
| 1/16-finals | Ristic M. | Costoulas S. | 0:1 RET. (2:6, 5:5) | details | 05.05.2026 | ||
| Quarter-finals | Uchijima M. | Costoulas S. | 2:0 (6:4, 6:1) | details | 01.05.2026 | ||
| 1/8-finals | Costoulas S. | Jeanjean L. | 2:1 (4:6, 7:61, 6:1) | details | 29.04.2026 | ||
| 1/16-finals | Costoulas S. | Aksu A. | 2:0 (7:5, 7:64) | details | 28.04.2026 | ||
| 1/8-finals | Costoulas S. | Pridankina E. | 0:2 (2:6, 3:6) | details | 22.04.2026 | ||
| 1/16-finals | Costoulas S. | Koevermans A. | 2:0 (6:4, 6:4) | details | 20.04.2026 | ||
| 1/8-finals | Hercog P. | Costoulas S. | 2:0 (6:1, 6:2) | details | 17.04.2026 | ||
| 1/16-finals | Martinez Cirez C. | Costoulas S. | 0:2 (1:6, 4:6) | details | 16.04.2026 | ||
| 1/16-finals | Vandewinkel H. | Costoulas S. | 2:1 (6:3, 2:6, 6:3) | details | 31.03.2026 | ||
| Final | Costoulas S. | Ma Y. | 2:0 (7:5, 6:3) | details | 22.03.2026 | ||
| Semi-finals | Kaji H. | Costoulas S. | 0:2 (1:6, 0:6) | details | 21.03.2026 | ||
| Quarter-finals | Costoulas S. | Kinoshita H. | 2:1 (6:4, 2:6, 7:5) | details | 20.03.2026 | ||
| 1/8-finals | Costoulas S. | Liu C. | 2:1 (64:7, 6:3, 7:63) | details | 19.03.2026 | ||
| 1/16-finals | Costoulas S. | Serban R. | 2:0 (6:3, 6:4) | details | 17.03.2026 | ||
| 1/16-finals | Okamura K. | Costoulas S. | 2:0 (6:4, 7:65) | details | 11.03.2026 | ||
| 1/16-finals | Costoulas S. | Gao X. | 0:2 (5:7, 2:6) | details | 04.03.2026 | ||
| Quarter-finals | Costoulas S. | Ferro F. | 0:2 (4:6, 3:6) | details | 20.02.2026 | ||
| 1/8-finals | Costoulas S. | Lew Yan Foon A. | 2:0 (6:2, 6:2) | details | 18.02.2026 | ||
| 1/16-finals | Costoulas S. | Paquet C. | 2:0 (6:1, 6:2) | details | 16.02.2026 | ||
| Quarter-finals | Prozorova T. | Costoulas S. | 2:1 (4:6, 6:2, 6:4) | details | 29.01.2026 | ||
| 1/8-finals | Costoulas S. | Ma Y. | 2:0 (6:2, 6:4) | details | 28.01.2026 | ||
| 1/16-finals | Costoulas S. | Morvayova V. | 2:1 (68:7, 7:64, 6:4) | details | 26.01.2026 | ||
| Quarter-finals | Costoulas S. | Korneeva A. | 0:2 (3:6, 1:6) | details | 23.01.2026 | ||
| 1/8-finals | Costoulas S. | Rosatello C. | 2:0 (6:1, 6:3) | details | 22.01.2026 | ||
| 1/16-finals | Costoulas S. | Zheng W. | 2:1 (6:3, 4:6, 6:2) | details | 20.01.2026 | ||
| Quarter-finals | Costoulas S. | Tararudee L. | 0:2 (4:6, 3:6) | details | 13.01.2026 | ||
| Quarter-finals | Jovic I. | Costoulas S. | 2:0 (6:2, 7:66) | details | 09.01.2026 | ||
| 1/8-finals | Costoulas S. | Quevedo K. | 2:0 (6:2, 6:0) | details | 07.01.2026 | ||
| 1/16-finals | Costoulas S. | Osuigwe W. | 2:1 (6:4, 3:6, 6:1) | details | 05.01.2026 | ||
| Final | Erjavec V. | Costoulas S. | 1:2 (3:6, 6:4, 3:6) | details | 03.01.2026 | ||
| Semi-finals | Tse E. | Costoulas S. | 0:2 (0:6, 1:6) | details | 03.01.2026 | ||
| Quarter-finals | Kozyreva M./Shymanovich I. | Costoulas S./Papamichail D. | CAN. | details | 03.06.2026 | ||
| 1/8-finals | Jakupovic D./Radisic N. | Costoulas S./Gorgodze E. | CAN. | details | 06.05.2026 | ||
| Final | Kempen M./Salden L. | Costoulas S./Jorge M. | 0:2 (4:6, 2:6) | details | 25.04.2026 | ||
| Semi-finals | Karamoko N./Semenistaja D. | Costoulas S./Jorge M. | 0:2 (5:7, 1:6) | details | 24.04.2026 | ||
| Quarter-finals | Kudermetova P./Osuigwe W. | Costoulas S./Jorge M. | 1:2 (66:7, 6:2, 8:10) | details | 23.04.2026 | ||
| 1/8-finals | Costoulas S./Jorge M. | Fossa Huergo N./Gorgodze E. | 2:0 (6:1, 6:4) | details | 21.04.2026 | ||
| Final | Costoulas S./Lansere S. | Kinoshita H./Saito S. | 2:0 (6:2, 6:4) | details | 14.03.2026 | ||
| Semi-finals | Costoulas S./Lansere S. | Ayukawa M./Morisaki K. | 2:1 (4:6, 6:2, 10:8) | details | 13.03.2026 | ||
| Quarter-finals | Nagata A./Sato H. | Costoulas S./Lansere S. | 1:2 (6:3, 3:6, 10:12) | details | 12.03.2026 | ||
| 1/8-finals | Costoulas S./Lansere S. | Lee Y./Zhang Y. | 2:1 (2:6, 6:4, 10:8) | details | 11.03.2026 | ||
| Semi-finals | De Stefano S./Maduzzi G. | Costoulas S./Falkowska W. | 2:0 (7:64, 6:2) | details | 27.11.2025 | ||