01/By surface
each with its own count, at equal weight
Hard
1-0
F. leads 1-0 in 1 meeting on hard
Clay
2-0
F. leads 2-0 in 2 meetings on clay
Grass
2-0
F. leads 2-0 in 2 meetings on grass
02/Every meeting
5 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, F. first |
|---|---|---|---|---|---|---|
| Jun 20, 2026 | Halle OpenATP500 | grass | semifinal | Tiafoe F. | 6-1, 6-3 | 26 v 81 |
| Jun 9, 2026 | Stuttgart OpenATP250 | grass | 1st round | Tiafoe F. | 7-6, 4-6, 6-4 | 26 v 85 |
| Jun 1, 2025 | French OpenGrand Slam, best of 5 | clay | 4th round | Tiafoe F. | 6-3, 6-4, 7-6 | 16 v 66 |
| May 14, 2023 | Internazionali BNL d'ItaliaMasters 1000 | clay | 2nd round | Tiafoe F. | 3-6, 7-5, 6-3 | 12 v 65 |
| Jan 16, 2023 | Australian OpenGrand Slam, best of 5 | hard | 1st round | Tiafoe F. | 6-3, 6-3, 6-7, 7-6 | 17 v 92 |
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. Tiafoe F. and Altmaier D. each carry the table against every opponent faced.