Katarzyna Piter defeated Ana Vrljic 6-4 5-7 6-2 in the US Open q128 on hard. The upset overturned the form book — Ana Vrljic came in leading the head-to-head 2–1. Katarzyna Piter narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-05 | Izmir 25K | F | hard | Ana Vrljic | 6-1 6-3 |
| 2013-01-21 | Andrezieux Boutheon 25K | Q16 | hard | Ana Vrljic | 6-1 5-7 7-5 |
| 2010-08-02 | Hechingen 25K | R16 | clay | Katarzyna Piter | 6-2 3-0 |
Averages over each player's completed matches in the selected window (155 vs 24). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About