Klara Koukalova advanced past Serena Williams via walkover in the Bastad round of 16. Klara Koukalova narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-07-15 | Bastad | SF | clay | Serena Williams | 6-0 6-4 |
| 2009-05-25 | Roland Garros | R128 | clay | Serena Williams | 6-3 6-7(5) 6-4 |
| 2009-04-06 | Marbella | R32 | clay | Klara Koukalova | 6-4 3-6 6-1 |
| 2003-05-12 | Rome | R32 | clay | Serena Williams | 6-4 6-3 |
| 2003-04-26 | Fed Cup WG W1: USA vs CZE | RR | hard | Serena Williams | 6-2 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 (45 vs 199). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About