Frantisek Polyak defeated Karel Triska 5-7 6-2 6-3 in the Croatia F4 round of 16 on clay. The upset overturned the form book — Karel Triska came in leading the head-to-head 1–0. Frantisek Polyak claimed a first win over Karel Triska in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-08-29 | Hungary F5 | R32 | clay | Karel Triska | 6-3 1-6 6-1 |