Reto Staubli defeated Mihnea Ion Nastase 1-6 7-6 6-3 in the Switzerland Masters 1 round of 16 on carpet. The upset overturned the form book — Mihnea Ion Nastase came in leading the head-to-head 1–0. Reto Staubli claimed a first win over Mihnea Ion Nastase in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-05-04 | Caribbean 1 Masters 2 | R32 | clay | Mihnea Ion Nastase | 7-6 7-5 |