Stephanie Vogt defeated Diana Buzean 7-5 6-3 in the Alphen A D Rijn 25K round of 32 on clay. The upset overturned the form book — Diana Buzean came in leading the head-to-head 1–0, but Stephanie Vogt had been the form player, winning 7 of their last 8 on clay. Stephanie Vogt claimed a first win over Diana Buzean in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-16 | Brescia 25K | R32 | clay | Diana Buzean | 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.