Christina Mchale defeated Caroline Wozniacki 6-4 7-5 in the Cincinnati round of 32 on hard. The upset overturned the form book — Caroline Wozniacki came in leading the head-to-head 5–1, defending last year's round of 16. Christina Mchale narrowed the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-09-30 | Beijing | R32 | hard | Caroline Wozniacki | 6-4 6-0 |
| 2016-01-04 | Auckland | R16 | hard | Caroline Wozniacki | 6-0 6-2 |
| 2015-05-04 | Madrid | R32 | clay | Caroline Wozniacki | 7-5 6-0 |
| 2014-01-13 | Australian Open | R64 | hard | Caroline Wozniacki | 6-0 1-6 6-2 |
| 2012-06-18 | Eastbourne | R32 | grass | Christina Mchale | 6-1 6-7(7) 6-4 |
| 2011-08-22 | New Haven | QF | hard | Caroline Wozniacki | 7-5 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 (200 vs 199). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About