Aleksandra Wozniak defeated Samantha Stosur 7-5 6-3 in the Japan Open quarter-final on hard. The upset overturned the form book — Samantha Stosur came in leading the head-to-head 2–1. Aleksandra Wozniak narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-08-08 | Toronto | R32 | hard | Samantha Stosur | 6-3 6-4 |
| 2008-07-14 | Stanford | QF | hard | Aleksandra Wozniak | 6-2 5-7 6-4 |
| 2007-02-19 | Memphis | R32 | hard | Samantha Stosur | 6-2 7-5 |
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 (200 vs 197). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About