Ilona Kremen defeated Diana Buzean 6-4 6-3 in the Rotterdam 25K round of 32 on clay. The upset overturned the form book — Diana Buzean came in leading the head-to-head 1–0. Ilona Kremen claimed a first win over Diana Buzean in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-03-07 | Antalya 10K | R32 | clay | Diana Buzean | 7-5 6-7(5) 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.