Eric Prodon defeated Guillaume Marx 7-6 2-6 6-3 in the Germany F6 round of 16 on clay. The upset overturned the form book — Guillaume Marx came in leading the head-to-head 1–0. Eric Prodon claimed a first win over Guillaume Marx in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-01-30 | France 2 Masters 3 | R32 | clay | Guillaume Marx | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.