Stan Wawrinka defeated Damir Dzumhur 6-3 6-4 in the St. Petersburg quarter-final on carpet. The upset overturned the form book — Damir Dzumhur came in ranked #103, leading the head-to-head 3–1, defending the title. Stan Wawrinka narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-07-20 | Umag | R16 | clay | Damir Dzumhur | 6-4 7-5 |
| 2020-01-20 | Australian Open | R128 | hard | Stan Wawrinka | 7-5 6-7(4) 6-4 6-4 |
| 2019-05-20 | Geneva | R16 | clay | Damir Dzumhur | 3-6 6-3 6-4 |
| 2017-02-27 | Dubai | R32 | hard | Damir Dzumhur | 7-6(4) 6-3 |
Averages from each player's recent completed matches (19 vs 20). ATP, WTA & Challenger.