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