Guillaume Marx defeated Fabien Cousin 6-3 6-3 in the France 5 Masters 4 round of 16 on hard. The upset overturned the form book — Fabien Cousin came in leading the head-to-head 1–0. Guillaume Marx claimed a first win over Fabien Cousin in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-03-09 | France 1 Masters 1 | R32 | carpet | Fabien Cousin | 7-5 6-4 |