Sander Groen defeated Serge Soulie 6-3 7-6 in the Italy 1 Masters 4 round of 16 on carpet. The upset overturned the form book — Serge Soulie came in leading the head-to-head 1–0. Sander Groen claimed a first win over Serge Soulie in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-03-02 | France 1 Masters 2 | R32 | carpet | Serge Soulie | 7-6 6-2 |