Karolina Kosinska defeated Joanna Sakowicz Kostecka 6-4 3-6 6-4 in the Torun 25K round of 32 on clay. Karolina Kosinska extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-08-15 | Kedzierzyn Kozle 25K | R16 | clay | Karolina Kosinska | 6-4 6-2 |
| 2003-08-04 | Gdynia 10K | R32 | clay | Joanna Sakowicz Kostecka | 6-1 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.