Natalija Kostic defeated Ingrid Alexandra Radu 6-4 4-6 6-3 in the Dobrich 10K qualifying round 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 | SF | clay | Natalija Kostic | 7-5 6-4 |