Jaroslav Bulant defeated Lukas Hovorka 6-1 6-2 in the Czechoslovakia Masters 4 round of 32 on clay. The upset overturned the form book — Lukas Hovorka came in leading the head-to-head 1–0. Jaroslav Bulant claimed a first win over Lukas Hovorka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-08-26 | Czechoslovakia Masters 3 | R16 | clay | Lukas Hovorka | 6-3 5-7 7-6 |