Klara Koukalova defeated Jelena Jankovic 6-4 1-6 6-1 in the Casablanca round of 32 on clay. The upset overturned the form book — Jelena Jankovic came in leading the head-to-head 3–1. Klara Koukalova narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-03-21 | Miami | R32 | hard | Jelena Jankovic | 7-5 6-1 |
| 2011-02-21 | Doha | QF | hard | Jelena Jankovic | 6-2 6-4 |
| 2010-10-04 | Beijing | R64 | hard | Jelena Jankovic | 7-5 7-5 |
| 2004-06-21 | Wimbledon | R128 | grass | Klara Koukalova | 3-6 6-1 6-4 |
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 (76 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About