Karel Triska defeated Marcel Zimmermann 6-3 6-4 in the Austria F7 round of 16 on clay. The upset overturned the form book — Marcel Zimmermann came in leading the head-to-head 2–0. Karel Triska claimed a first win over Marcel Zimmermann in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-07-13 | Austria F5 | R16 | clay | Marcel Zimmermann | 5-7 6-3 6-3 |
| 2008-01-14 | Austria F1 | R32 | carpet | Marcel Zimmermann | 6-4 6-3 |