Paul Dogger defeated Reto Staubli 6-3 6-1 in the Czechoslovakia Masters 1 round of 32 on clay. The upset overturned the form book — Reto Staubli came in leading the head-to-head 1–0. Paul Dogger claimed a first win over Reto Staubli in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-08-26 | Czechoslovakia Masters 4 | QF | clay | Reto Staubli | 5-7 6-3 7-6 |