Natalija Kostic defeated Nikola Vajdova 6-3 4-6 6-3 in the Nis 10K round of 32 on clay. The result followed the form book — Natalija Kostic came in leading the head-to-head 1–0. Natalija Kostic extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-06-27 | Prokuplje 10K | F | clay | Natalija Kostic | 6-2 6-3 |