Klara Koukalova defeated Arantxa Parra Santonja 6-3 6-1 in the Bastad round of 16 on clay. The upset overturned the form book — Arantxa Parra Santonja came in leading the head-to-head 2–0. Klara Koukalova claimed a first win over Arantxa Parra Santonja in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-04-26 | Budapest | R32 | clay | Arantxa Parra Santonja | 6-3 6-1 |
| 2003-08-25 | US Open | R128 | hard | Arantxa Parra Santonja | 6-2 1-6 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 (76 vs 1). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About