Petra Cetkovska defeated Caroline Wozniacki 6-4 5-7 7-6 in the US Open round of 64 on hard. The upset overturned the form book — Caroline Wozniacki came in leading the head-to-head 2–1, defending last year's final. Petra Cetkovska narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-24 | Wimbledon | R64 | grass | Petra Cetkovska | 6-2 6-2 |
| 2012-03-19 | Miami | R32 | hard | Caroline Wozniacki | 6-3 7-5 |
| 2011-08-22 | New Haven | F | hard | Caroline Wozniacki | 6-4 6-1 |
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 (8 vs 199). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About