Xenia Knoll defeated Natalija Kostic 6-3 6-3 in the Belgrade 10K final on clay. The upset overturned the form book — Natalija Kostic came in leading the head-to-head 1–0. Xenia Knoll claimed a first win over Natalija Kostic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-09-03 | Belgrade 10K | QF | clay | Natalija Kostic | 6-7(4) 6-4 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.