01/By surface
each with its own count, at equal weight
Hard
0-2
S. leads 2-0 in 2 meetings on hard
Clay
Never on clay
no meeting on this surface
Grass
Never on grass
no meeting on this surface
02/Every meeting
2 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, M. first |
|---|---|---|---|---|---|---|
| Oct 30, 2021 | Transylvania OpenWTA250 | hard | semifinal | Halep S. | 6-0, 6-1 | 55 v 18 |
| Oct 8, 2021 | BNP Paribas OpenWTA1000 | hard | 2nd round | Halep S. | 7-6, 6-1 | 58 v 17 |
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. Kostyuk M. and Halep S. each carry the table against every opponent faced.