Jannik Sinner leads the record after 4 meetings.
| Surface | Altmaier | Sinner |
|---|---|---|
| Hard | 0 | 3 |
| Clay | 1 | 0 |
| Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|
| Erste Bank Open - Vienna 2025 | R1 | Hard (Indoor) | Sinner | 6-0 6-2 |
| Shanghai Rolex Masters - Shanghai 2025 | R2 | Hard | Sinner | 6-3 6-3 |
| French Open - Paris 2023 | R2 | Clay | Altmaier | 6-7(0) 7-6(7) 1-6 7-6(4) 7-5 |
| U.S. Open - New York 2022 | R1 | Hard | Sinner | 5-7 6-2 6-1 3-6 6-1 |
Meetings are the ones on our record. Older matches may be missing.
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