Korina Perkovic defeated Sarah Gronert 6-7 7-6 7-6 in the Stuttgart Vaihingen 25K round of 16 on clay. The upset overturned the form book — Sarah Gronert came in leading the head-to-head 2–0. Korina Perkovic claimed a first win over Sarah Gronert in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-17 | Wahlstedt 10K | SF | clay | Sarah Gronert | 6-2 7-6(4) |
| 2009-06-29 | Stuttgart 25K | R16 | clay | Sarah Gronert | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.