Polona Hercog defeated Andrea Petkovic 4-6 7-6 6-1 in the Madrid qualifying round 2 on clay. The upset overturned the form book — Andrea Petkovic came in leading the head-to-head 2–1. Polona Hercog narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-03-19 | Miami | R128 | hard | Andrea Petkovic | 6-2 6-0 |
| 2011-05-09 | Rome | R32 | clay | Polona Hercog | 6-4 6-3 |
| 2011-02-05 | Fed Cup WG2 R1: SLO vs GER | RR | clay | Andrea Petkovic | 6-1 6-2 |
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 (176 vs 123). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Hercog P.: 1 day rest · 1 match, 26 games (7d). Higher means fresher. About