Karolina Kosinska defeated Magdalena Kiszczynska 6-2 6-3 in the Szczecin 25K round of 16 on clay. The upset overturned the form book — Magdalena Kiszczynska came in leading the head-to-head 2–1. Karolina Kosinska narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-05-26 | Olecko 10K | SF | clay | Magdalena Kiszczynska | 6-0 6-3 |
| 2006-03-27 | RomeTiro a Volo 10K | R16 | clay | Magdalena Kiszczynska | 6-2 7-5 |
| 2004-07-05 | Torun 25K | F | clay | Karolina Kosinska | 4-6 7-5 6-1 |