Peter Gojowczyk defeated Marcel Zimmermann 5-7 6-3 6-1 in the Germany F16 qualifying round on clay. The upset overturned the form book — Marcel Zimmermann came in leading the head-to-head 2–0. Peter Gojowczyk claimed a first win over Marcel Zimmermann in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-10-02 | Germany 1 Satellite 2 | QF | carpet | Marcel Zimmermann | 6-2 6-2 |
| 2005-10-03 | Germany 1 Satellite 2 | R16 | carpet | Marcel Zimmermann | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.