Martina Muller defeated Karin Knapp 6-7 6-3 7-6 in the Portoroz round of 32 on hard. The result followed the form book — Martina Muller came in leading the head-to-head 2–1. Martina Muller extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-05-26 | Roland Garros | R128 | clay | Karin Knapp | 6-0 6-4 |
| 2007-07-16 | Palermo | SF | clay | Martina Muller | 6-4 4-6 6-1 |
| 2006-04-10 | Civitavecchia 25K | R16 | clay | Martina Muller | 7-5 6-2 |
Averages over each player's completed matches in the selected window (58 vs 200). 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