Kateryna Kozlova defeated Tetyana Arefyeva 6-0 6-4 in the Shymkent 25K semi-final on hard. The upset overturned the form book — Tetyana Arefyeva came in leading the head-to-head 2–0, but Kateryna Kozlova had been the form player, winning 4 of their last 6 on hard. Kateryna Kozlova claimed a first win over Tetyana Arefyeva in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-04-25 | Karshi 25K | SF | hard | Tetyana Arefyeva | 7-5 6-1 |
| 2009-07-13 | Bucha 25K | R32 | clay | Tetyana Arefyeva | 7-6(2) 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.