01/By surface
each with its own count, at equal weight
Hard
0-2
G. leads 2-0 in 2 meetings on hard
Clay
Never on clay
no meeting on this surface
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, D. first |
|---|---|---|---|---|---|---|
| Jan 16, 2025 | Australian OpenGrand Slam, best of 5 | hard | 2nd round | Monfils G. | 7-5, 6-3, 7-6 | 101 v 41 |
| Oct 25, 2023 | Vienna OpenATP500 | hard | 1st round | Monfils G. | 6-4, 6-4 | 47 v 89 |
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. Altmaier D. and Monfils G. each carry the table against every opponent faced.