Katarzyna Piter defeated Oksana Kalashnikova 6-3 7-5 in the Seoul qualifying final on hard. The upset overturned the form book — Oksana Kalashnikova 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 |
|---|---|---|---|---|---|
| 2010-11-08 | Minsk 25K | R32 | hard | Oksana Kalashnikova | 7-6(12) 6-2 |
| 2009-06-29 | Torun 25K | R16 | clay | Oksana Kalashnikova | 6-2 6-0 |
| 2008-03-24 | Cairo 10K | SF | clay | Katarzyna Piter | 6-4 6-1 |
Averages over each player's completed matches in the selected window (113 vs 23). 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