01/By surface
each with its own count, at equal weight
Hard
3-0
G. leads 3-0 in 3 meetings 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
4 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, G. first |
|---|---|---|---|---|---|---|
| Feb 8, 2018 | Garanti Koza Sofia OpenATP250 | hard | 2nd round | Muller G. | 4-6, 7-6, 7-6 | 28 v 77 |
| Jun 14, 2017 | Ricoh OpenATP250 | grass | 2nd round | Muller G. | 7-6, 6-4 | 28 v 76 |
| Mar 25, 2017 | Sony Ericsson OpenMasters 1000 | hard | 2nd round | Muller G. | 7-6, 7-6 | 29 v 80 |
| Feb 9, 2016 | ABN AMRO World Tennis TournamentATP500 | hard | 1st round | Muller G. | 4-6, 7-6, 6-4 | 40 v 36 |
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. Muller G. and Seppi A. each carry the table against every opponent faced.