Boris Borgula defeated Petr Kralert 6-4 2-6 6-4 in the Czech Rep F1 round of 16 on clay. The upset overturned the form book — Petr Kralert came in leading the head-to-head 1–0. Boris Borgula claimed a first win over Petr Kralert in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-15 | Poland F1 | QF | clay | Petr Kralert | 2-6 7-5 6-2 |