Karin Knapp defeated Maria Joao Koehler 6-3 2-6 6-4 in the Mallorca 10K qualifying round on clay. The upset overturned the form book — Maria Joao Koehler came in leading the head-to-head 2–0. Karin Knapp claimed a first win over Maria Joao Koehler in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-01-14 | Australian Open | R128 | hard | Maria Joao Koehler | 3-6 6-3 6-3 |
| 2011-01-31 | Rabat 25K | SF | clay | Maria Joao Koehler | 2-6 6-2 6-2 |
Averages over each player's completed matches in the selected window (154 vs 23). 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