Darina Sedenkova defeated Vivienne Vierin 3-6 7-5 6-3 in the Dubrovnik 10K round of 32 on clay. The upset overturned the form book — Vivienne Vierin came in leading the head-to-head 1–0. Darina Sedenkova claimed a first win over Vivienne Vierin in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-09-21 | Telavi 25K | R32 | clay | Vivienne Vierin | 6-0 6-4 |