Vlada Katic defeated Sina Herrmann 6-3 3-6 6-1 in the W40 Oldenzaal q32 on clay. The upset overturned the form book — Sina Herrmann came in leading the head-to-head 1–0. Vlada Katic claimed a first win over Sina Herrmann in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-08-06 | W25+H Leipzig | Q32 | clay | Sina Herrmann | 6-3 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.