Dirk Leppen defeated Sander Groen 6-4 5-7 6-4 in the Germany 1 Masters 1 final on carpet. The result followed the form book — Dirk Leppen came in leading the head-to-head 1–0. Dirk Leppen extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-24 | Netherlands Masters 4 | R32 | clay | Dirk Leppen | 6-3 6-1 |