Petr Kralert defeated Boris Borgula 2-6 7-5 6-2 in the Poland F1 qualifying round on clay. The upset overturned the form book — Boris Borgula came in leading the head-to-head 1–0. Petr Kralert claimed a first win over Boris Borgula in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-05-26 | Czech Rep F1 | R16 | clay | Boris Borgula | 6-4 2-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.