Bostjan Osabnik defeated Jan Mertl 5-7 7-6 6-2 in the Czech Rep F4 qualifying round on hard. The upset overturned the form book — Jan Mertl came in leading the head-to-head 1–0. Bostjan Osabnik claimed a first win over Jan Mertl in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-06-10 | Slovenia F2 | R32 | clay | Jan Mertl | 6-1 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.