Karin Knapp defeated Martina Muller 6-0 6-4 in the Roland Garros round of 128 on clay. The upset overturned the form book — Martina Muller came in leading the head-to-head 3–0, defending last year's round of 64. Karin Knapp claimed a first win over Martina Muller in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-07-16 | Palermo | SF | clay | Martina Muller | 6-4 4-6 6-1 |
| 2006-09-18 | Portoroz | R32 | hard | Martina Muller | 6-7 6-3 7-6 |
| 2006-04-10 | Civitavecchia 25K | R16 | clay | Martina Muller | 7-5 6-2 |
Averages over each player's completed matches in the selected window (183 vs 14). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About