Anna Korzeniak defeated Joanna Sakowicz Kostecka 6-0 6-2 in the Katowice 25K round of 16 on clay. The upset overturned the form book — Joanna Sakowicz Kostecka came in leading the head-to-head 1–0. Anna Korzeniak claimed a first win over Joanna Sakowicz Kostecka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-11-21 | Opole 25K | R32 | carpet | Joanna Sakowicz Kostecka | 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.