Natalija Kostic defeated Elizaveta Ianchuk 6-2 6-1 in the Zajecar 10K final on clay. The upset overturned the form book — Elizaveta Ianchuk came in leading the head-to-head 1–0. Natalija Kostic claimed a first win over Elizaveta Ianchuk in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-10-22 | Antalya 10K | QF | clay | Elizaveta Ianchuk | 6-2 4-6 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.