01/By surface
each with its own count, at equal weight
Hard
0-1
S. leads 1-0 in 1 meeting on hard
Clay
1-1
Level 1-1 in 2 meetings 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, K. first |
|---|---|---|---|---|---|---|
| May 10, 2019 | Mutua Madrid OpenPremier | clay | semifinal | Bertens K. | 6-2, 7-5 | 7 v 8 |
| Oct 24, 2018 | BNP Paribas WTA FinalsTour Championships | hard | round robin | Stephens S. | 7-6, 2-6, 6-3 | 9 v 6 |
| May 15, 2013 | Internazionali BNL d'ItaliaPremier | clay | 2nd round | Stephens S. | 4-6, 6-3, 6-2 | 59 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. Bertens K. and Stephens S. each carry the table against every opponent faced.