Klara Koukalova defeated Petra Martic 6-2 6-4 in the Katowice round of 32 on hard. The upset overturned the form book — Petra Martic came in leading the head-to-head 1–0, defending last year's round of 32. Klara Koukalova claimed a first win over Petra Martic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-07-21 | Portoroz | R16 | hard | Petra Martic | 6-3 4-6 7-6(3) |
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 (44 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About