Kateryna Bondarenko defeated Petra Kvitova 7-5 6-3 in the New Haven round of 32 on hard. The upset overturned the form book — Petra Kvitova came in leading the head-to-head 4–1, but Kateryna Bondarenko had been the form player, winning 1 of their last 4 on hard. Kateryna Bondarenko narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-06-25 | Eastbourne | R32 | grass | Petra Kvitova | 7-5 6-3 |
| 2017-07-31 | Stanford | R16 | hard | Petra Kvitova | 6-2 6-2 |
| 2012-07-30 | Olympics | R64 | hard | Petra Kvitova | 6-4 5-7 6-4 |
| 2010-10-18 | Moscow | R32 | hard | Kateryna Bondarenko | 6-3 6-7(7) 6-1 |
| 2008-05-19 | Strasbourg | R32 | clay | Petra Kvitova | 3-6 6-4 6-2 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.