Petar Popovic defeated Stefan Kilchhofer 3-6 7-5 6-0 in the Turkey 1 4 semi-final on clay. The upset overturned the form book — Stefan Kilchhofer came in leading the head-to-head 1–0, but Petar Popovic had been the form player, winning 3 of their last 4 on clay. Petar Popovic claimed a first win over Stefan Kilchhofer in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-04-03 | Turkey 1 2 | QF | clay | Stefan Kilchhofer | 6-1 6-2 |