01/By surface
each with its own count, at equal weight
Hard
1-0
K. leads 1-0 in 1 meeting on hard
Clay
1-0
K. leads 1-0 in 1 meeting on clay
Grass
1-0
K. leads 1-0 in 1 meeting on grass
02/Every meeting
3 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, K. first |
|---|---|---|---|---|---|---|
| Jun 26, 2019 | Eastbourne InternationalPremier | grass | 3rd round | Bertens K. | 6-3, 6-3 | 4 v 356 |
| Apr 23, 2019 | Porsche Tennis Grand PrixPremier | clay | 1st round | Bertens K. | 7-5, 6-2 | 7 v 681 |
| Oct 14, 2014 | BGL BNP Paribas Luxembourg OpenInternational | hard | 1st round | Bertens K. | 2-6, 6-2, 6-4 | 73 v 76 |
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 Friedsam A.L. each carry the table against every opponent faced.