Klara Koukalova defeated Petra Kvitova 6-3 2-6 6-1 in the Prerov 75K qualifying round on clay. The upset overturned the form book — Petra Kvitova came in leading the head-to-head 2–1. Klara Koukalova narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-19 | New Haven | SF | hard | Petra Kvitova | 6-0 6-1 |
| 2013-03-04 | Indian Wells | R16 | hard | Petra Kvitova | 6-2 6-3 |
| 2007-06-11 | Zlin 50K | F | clay | Klara Koukalova | 6-4 6-1 |
Averages over each player's completed matches in the selected window (75 vs 199). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About