Patricia Veresova defeated Natalia Guitler 6-3 6-4 in the Lima 10K round of 32 on clay. The upset overturned the form book — Natalia Guitler came in leading the head-to-head 1–0. Patricia Veresova claimed a first win over Natalia Guitler in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-03-23 | Lima 10K | R32 | clay | Natalia Guitler | 7-5 2-6 7-5 |