Natalija Kostic defeated Julia Stamatova 6-3 6-2 in the Antalya 10K qualifying round on clay. The result followed the form book — Natalija Kostic came in leading the head-to-head 3–0. Natalija Kostic extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-11-17 | Antalya 10K | R16 | clay | Natalija Kostic | 6-3 1-6 6-1 |
| 2012-02-13 | Antalya Kaya Belek 10K | R16 | clay | Natalija Kostic | 6-4 6-1 |
| 2011-10-17 | Dubrovnik 10K | R32 | clay | Natalija Kostic | 7-5 4-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.