01/By surface
each with its own count, at equal weight
Hard
Never on hard
no meeting on this surface
Clay
2-0
K. leads 2-0 in 2 meetings on clay
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, K. first |
|---|---|---|---|---|---|---|
| Apr 8, 2018 | Family Circle CupPremier | clay | semifinal | Bertens K. | 6-4, 6-7, 7-6 | 27 v 14 |
| Jun 1, 2016 | French OpenGrand Slam | clay | 4th round | Bertens K. | 7-6, 6-3 | 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. Bertens K. and Keys M. each carry the table against every opponent faced.