Elizaveta Ianchuk defeated Natalija Kostic 6-2 4-6 6-1 in the Antalya 10K qualifying round on clay. The upset overturned the form book — Natalija Kostic came in leading the head-to-head 1–0. Elizaveta Ianchuk claimed a first win over Natalija Kostic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-08-04 | Zajecar 10K | F | clay | Natalija Kostic | 6-2 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.