Marcel Zimmermann defeated Vjekoslav Skenderovic 6-4 6-0 in the Slovenia F1 qualifying round on clay. The upset overturned the form book — Vjekoslav Skenderovic came in leading the head-to-head 1–0, but Marcel Zimmermann had been the form player, winning 4 of their last 5 on clay. Marcel Zimmermann claimed a first win over Vjekoslav Skenderovic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-02-13 | Croatia F1 | R32 | hard | Vjekoslav Skenderovic | 6-3 2-6 6-2 |