Kim Clijsters defeated Julia Vakulenko 6-3 6-2 in the Warsaw round of 16 on clay. The upset overturned the form book — Julia Vakulenko came in leading the head-to-head 1–0, defending last year's round of 16. Kim Clijsters claimed a first win over Julia Vakulenko in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-04-30 | Warsaw | R16 | clay | Julia Vakulenko | 7-6(3) 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (157 vs 57). ATP, WTA & Challenger.