Reto Staubli defeated Peter Kerekes 7-5 6-4 in the Hungary Masters 4 round of 32 on clay. The result followed the form book — Reto Staubli came in leading the head-to-head 1–0. Reto Staubli extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-03 | Hungary Masters 1 | R16 | clay | Reto Staubli | 1-6 6-4 6-1 |