S. Cirstea leads the head-to-head 2-0 since 2018 against K. Birrell, over 2 matches.
| Surface | K. Birrell | S. Cirstea |
|---|---|---|
| Grass | 0 | 1 |
| Hard | 0 | 1 |
| Date | Winner | Score | Event |
|---|---|---|---|
| July 2, 2026 | S. Cirstea | 2 - 0 | Wimbledon · 1/32-finals · grass |
| March 9, 2023 | S. Cirstea | 2 - 0 | WTA Indian Wells · 1/64-finals · hard |