Marcel Reuter defeated Sander Groen 6-1 6-2 in the Netherlands Masters 4 round of 32 on clay. The result followed the form book — Marcel Reuter came in leading the head-to-head 1–0. Marcel Reuter extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-24 | Netherlands Masters 2 | R32 | clay | Marcel Reuter | 2-6 6-4 6-4 |