Peter Mayer Tischer defeated Tobias Koeck 6-3 6-3 in the Poland F7 round of 32 on clay. The upset overturned the form book — Tobias Koeck came in leading the head-to-head 1–0. Peter Mayer Tischer claimed a first win over Tobias Koeck in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-08-22 | Germany F12 | R32 | clay | Tobias Koeck | 5-7 6-3 6-4 |