Valentin Guenther defeated Patrick Mayer (GER) 6-3 4-6 6-4 in the Germany F11 q32 on clay. The upset overturned the form book — Patrick Mayer (GER) came in leading the head-to-head 1–0. Valentin Guenther claimed a first win over Patrick Mayer (GER) in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-03-05 | M15 Oslo 1 | Q16 | hard | Patrick Mayer (GER) | 6-1 3-6 11-9 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.