01/By surface
each with its own count, at equal weight
Hard
1-0
Z. leads 1-0 in 1 meeting on hard
Clay
2-0
Z. leads 2-0 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, Z. first |
|---|---|---|---|---|---|---|
| Apr 25, 2018 | Porsche Tennis Grand PrixPremier | clay | 1st round | Diyas Z. | 6-3, 6-2 | 52 v 56 |
| Mar 24, 2018 | Sony Ericsson OpenPremier | hard | 3rd round | Diyas Z. | 4-6, 7-5, 6-0 | 56 v 57 |
| May 23, 2016 | French OpenGrand Slam | clay | 1st round | Diyas Z. | 2-6, 6-4, 6-2 | 90 v 100 |
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. Diyas Z. and Witthoeft C. each carry the table against every opponent faced.