01/By surface
each with its own count, at equal weight
Hard
3-1
E. leads 3-1 in 4 meetings on hard
Clay
Never on clay
no meeting on this surface
Grass
Never on grass
no meeting on this surface
02/Every meeting
4 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, E. first |
|---|---|---|---|---|---|---|
| Feb 14, 2019 | Qatar Total OpenPremier | hard | quarterfinal | Mertens E. | 6-4, 6-3 | 21 v 8 |
| Dec 31, 2018 | Brisbane InternationalPremier | hard | 1st round | Bertens K. | 6-2, 6-7, 6-4 | 12 v 9 |
| Aug 21, 2017 | Connecticut OpenPremier | hard | 1st round | Mertens E. | 4-6, 6-4, 6-2 | 46 v 25 |
| Jan 12, 2017 | Hobart InternationalInternational | hard | quarterfinal | Mertens E. | 6-2, 7-5 | 127 v 22 |
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. Mertens E. and Bertens K. each carry the table against every opponent faced.