01/By surface
each with its own count, at equal weight
Hard
1-0
R. leads 1-0 in 1 meeting on hard
Clay
0-1
Kjaer N. leads 1-0 in 1 meeting 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, R. first |
|---|---|---|---|---|---|---|
| Apr 23, 2026 | Mutua Madrid OpenMasters 1000 | clay | 1st round | Budkov Kjaer N.ret. | 5-3 | 70 v 140 |
| Jan 19, 2026 | Australian OpenGrand Slam, best of 5 | hard | 1st round | Opelka R. | 6-4, 6-3, 6-4 | 63 v 135 |
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. Opelka R. and Budkov Kjaer N. each carry the table against every opponent faced.