Thomas Gollwitzer defeated Reto Staubli 6-1 6-2 in the Czechoslovakia Masters 4 semi-final on clay. The result followed the form book — Thomas Gollwitzer came in leading the head-to-head 1–0. Thomas Gollwitzer extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-08-26 | Czechoslovakia Masters 2 | R16 | clay | Thomas Gollwitzer | 4-6 6-2 6-3 |