World: Billie Jean King Cup - World Group - Singles - Relegation - Play Offs
United Kingdom: W75 Glasgow - Singles - Main
Portugal: W75 Quinta do Lago - Singles - Main
Turkey: Samsun - Singles - Main
France: W75 Le Neubourg - Singles - Main
Greece: W35 Heraklion - Singles - Main
USA: US Open - Singles - Qualification
Poland: Warsaw - Singles - Main
Select tournament type
Costoulas Sofia Stats, Results & Fixtures
- Show:
 Australia: Australian Open - Singles - Qualification | |||||||
|---|---|---|---|---|---|---|---|
| Quarter-finals | Costoulas S. | Tararudee L. | 0:2 (4:6, 3:6) | details | 13.01.2026 | ||
 New Zealand: Auckland - Singles - Main | |||||||
| 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 | ||
| New Zealand: Auckland - Singles - Qualification | |||||||
| Final | Erjavec V. | Costoulas S. | 1:2 (3:6, 6:4, 3:6) | details | 03.01.2026 | ||
- Show:
 Italy: W50 Ortisei - Doubles - Main | |||||||
|---|---|---|---|---|---|---|---|
| Semi-finals | De Stefano S./Maduzzi G. | Costoulas S./Falkowska W. | 2:0 (7:64, 6:2) | details | 27.11.2025 | ||
| Quarter-finals | Costoulas S./Falkowska W. | Meyer Auf Der Heide L./Wildgruber A. | 2:0 (7:5, 6:2) | details | 26.11.2025 | ||
| 1/8-finals | Costoulas S./Falkowska W. | Paganetti V./Xu M. | 2:0 (6:2, 6:4) | details | 24.11.2025 | ||
 Slovakia: W50 Trnava - Doubles - Main | |||||||
| Quarter-finals | Costoulas S./Havlickova L. | Dudeney A./Malygina E. | 0:2 (4:6, 4:6) | details | 20.11.2025 | ||
| 1/8-finals | Costoulas S./Havlickova L. | Banks A./Zelnickova R. | 2:0 (6:2, 6:1) | details | 18.11.2025 | ||
