01/By surface
each with its own count, at equal weight
Hard
1-0
G. leads 1-0 in 1 meeting on hard
Clay
Never on clay
no meeting on this surface
Grass
1-0
G. leads 1-0 in 1 meeting on grass
02/Every meeting
2 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, G. first |
|---|---|---|---|---|---|---|
| Jun 12, 2018 | Mercedes CupATP250 | grass | 1st round | Simon G. | 6-0, 6-3 | 55 v 281 |
| Feb 13, 2013 | ABN AMRO World Tennis TournamentATP500 | hard | 2nd round | Simon G. | 6-3, 6-1 | 14 v 145 |
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. Simon G. and Viola M. each carry the table against every opponent faced.