Stefan Kilchhofer defeated Petar Popovic 6-1 6-2 in the Turkey 1 2 qualifying round on clay. The upset overturned the form book — Petar Popovic came in leading the head-to-head 1–0. Stefan Kilchhofer claimed a first win over Petar Popovic in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-04-03 | Turkey 1 4 | SF | clay | Petar Popovic | 3-6 7-5 6-0 |