Level, 1 wins each over 2 singles meetings since 2023. Last meeting on 27/08/2026 at U.S. Open - New York.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 27/08/2026 | U.S. Open - New York | Qualifying 2 | hard | Kalieva | 3-6 6-3 6-4 |
| 19/05/2023 | W25 Feld am See | Semi-final | clay | Costoulas | 6-2 6-3 |
| hard | Kalieva 1 - 0 Costoulas |
| clay | Kalieva 0 - 1 Costoulas |
| 2026 | Kalieva 1 - 0 Costoulas |
| 2023 | Kalieva 0 - 1 Costoulas |
191 wins, 163 losses since 2021 (54.0%).
Last matches: D V D V V
208 wins, 139 losses since 2021 (59.9%).
Last matches: D D V D D
Level, 1 wins each over 2 singles meetings since 2023.
On 27/08/2026, at U.S. Open - New York (Qualifying 2): Elvina Kalieva won 3-6 6-3 6-4.