Polona Hercog defeated Tsvetana Pironkova 3-6 7-5 6-4 in the Bastad quarter-final on clay. The upset overturned the form book — Tsvetana Pironkova came in leading the head-to-head 2–0, but Polona Hercog had been the form player, winning 2 of their last 4 on clay. Polona Hercog claimed a first win over Tsvetana Pironkova in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-02-13 | Doha | R64 | hard | Tsvetana Pironkova | 6-0 6-4 |
| 2008-05-19 | Istanbul | R32 | clay | Tsvetana Pironkova | 6-4 7-5 |
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 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About