Korina Perkovic defeated Nicola Geuer 6-0 2-6 7-5 in the Stuttgart Stammheim 10K round of 16 on hard. The upset overturned the form book — Nicola Geuer came in leading the head-to-head 1–0. Korina Perkovic claimed a first win over Nicola Geuer in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-10 | Koksijde 25K | R16 | clay | Nicola Geuer | 6-0 6-4 |