Lukas Hovorka defeated Jaroslav Bulant 6-3 5-7 7-6 in the Czechoslovakia Masters 3 round of 16 on clay. The upset overturned the form book — Jaroslav Bulant came in leading the head-to-head 1–0. Lukas Hovorka claimed a first win over Jaroslav Bulant in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-08-26 | Czechoslovakia Masters 4 | R32 | clay | Jaroslav Bulant | 6-1 6-2 |