Vilim Visak defeated Stefan Wiespeiner 6-4 6-3 in the Bosnia & Herzegovina F1 round of 16 on clay. The upset overturned the form book — Stefan Wiespeiner came in leading the head-to-head 2–0. Vilim Visak claimed a first win over Stefan Wiespeiner in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-08-07 | Austria F9 | R32 | clay | Stefan Wiespeiner | 6-4 |
| 2006-05-22 | Bosnia & Herzegovina F2 | SF | clay | Stefan Wiespeiner | 7-5 6-3 |