01/By surface
each with its own count, at equal weight
Hard
2-0
S. leads 2-0 in 2 meetings on hard
Clay
1-0
S. leads 1-0 in 1 meeting on clay
Grass
Never on grass
no meeting on this surface
02/Every meeting
3 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, S. first |
|---|---|---|---|---|---|---|
| Mar 21, 2026 | Miami OpenWTA1000 | hard | 3rd round | Cirstea S. | 6-3, 6-2 | 35 v 19 |
| Apr 25, 2021 | Istanbul CupWTA250 | clay | final | Cirstea S. | 6-1, 7-6 | 67 v 17 |
| Feb 14, 2018 | Qatar Total OpenPremier | hard | 2nd round | Cirstea S. | 7-5, 6-4 | 38 v 20 |
A record, never a share of meetings. Main-draw singles since 2013; a meeting ended by retirement is counted with the sets that were played and marked; a walkover is listed and counted in neither column. Cirstea S. and Mertens E. each carry the table against every opponent faced.