Boris Borgula defeated Petr Kovacka 6-1 5-7 6-2 in the Slovenia Masters 4 round of 16 on clay. The upset overturned the form book — Petr Kovacka came in leading the head-to-head 1–0. Boris Borgula claimed a first win over Petr Kovacka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-07-22 | Slovenia F2 | R16 | clay | Petr Kovacka | 3-6 7-6 6-4 |