Petr Dezort defeated Michal Mertinak 6-7 6-2 6-0 in the Slovak Rep F1 qualifying round on clay. The upset overturned the form book — Michal Mertinak came in leading the head-to-head 2–0. Petr Dezort claimed a first win over Michal Mertinak in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-12-09 | Czech Rep F10 | R32 | hard | Michal Mertinak | 6-1 7-5 |
| 2001-03-19 | Egypt 1 2 | F | clay | Michal Mertinak | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.