01/By surface
each with its own count, at equal weight
Hard
2-2
Level 2-2 in 4 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
5 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, S. first |
|---|---|---|---|---|---|---|
| Apr 25, 2024 | Mutua Madrid OpenWTA1000 | clay | 2nd round | Stephens S. | 3-6, 6-3, 6-1 | 33 v 29 |
| Jan 3, 2024 | Brisbane InternationalWTA500 | hard | 2nd round | Mertens E. | 2-6, 6-1, 6-3 | 44 v 30 |
| Sep 13, 2023 | San Diego OpenWTA500 | hard | 1st round | Stephens S. | 6-1, 6-3 | 36 v 29 |
| Sep 3, 2018 | US OpenGrand Slam | hard | 4th round | Stephens S. | 6-3, 6-3 | 3 v 15 |
| Aug 16, 2018 | Western & Southern Financial Group Women's OpenPremier | hard | 3rd round | Mertens E. | 7-6, 6-2 | 3 v 14 |
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. Stephens S. and Mertens E. each carry the table against every opponent faced.