Caroline Wozniacki defeated Andrea Petkovic 6-1 7-6 in the US Open quarter-final on hard. The result followed the form book — Caroline Wozniacki came in leading the head-to-head 4–1, defending last year's semi-final. Caroline Wozniacki extended the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-06-24 | Eastbourne | R32 | grass | Caroline Wozniacki | 6-4 6-4 |
| 2015-06-22 | Eastbourne | QF | grass | Caroline Wozniacki | 7-5 6-1 |
| 2014-08-25 | US Open | R32 | hard | Caroline Wozniacki | 6-3 6-2 |
| 2011-04-18 | Stuttgart | QF | clay | Caroline Wozniacki | 6-4 6-1 |
| 2011-03-21 | Miami | R16 | hard | Andrea Petkovic | 7-5 3-6 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 (199 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About