Guillaume Marx defeated Massimo Valeri 5-7 6-3 7-5 in the Italy 2 Masters 1 qualifying round on clay. The upset overturned the form book — Massimo Valeri came in leading the head-to-head 2–0, but Guillaume Marx had been the form player, winning 4 of their last 7 on clay. Guillaume Marx claimed a first win over Massimo Valeri in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-04-20 | Italy F4 | R16 | clay | Massimo Valeri | 6-3 7-6 |
| 1995-06-03 | Italy 2 Masters 2 | SF | clay | Massimo Valeri | 2-6 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.