Ana Vrljic defeated Joanna Sakowicz Kostecka 6-2 7-6 in the Hamburg 25K round of 16 on carpet. The upset overturned the form book — Joanna Sakowicz Kostecka came in leading the head-to-head 1–0. Ana Vrljic 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 | QF | carpet | Joanna Sakowicz Kostecka | 4-6 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.