Jaroslav Bulant defeated Thomas Prerovsky 7-6 6-4 in the Switzerland Masters 1 round of 32 on carpet. The upset overturned the form book — Thomas Prerovsky came in leading the head-to-head 2–0. Jaroslav Bulant claimed a first win over Thomas Prerovsky in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-10-26 | Switzerland Masters 3 | R16 | carpet | Thomas Prerovsky | 6-4 6-2 |
| 1991-04-06 | Yugoslavia Masters 1 | SF | clay | Thomas Prerovsky | 7-5 6-2 |