Mariano Zabaleta defeated Andrea Gaudenzi 6-0 7-5 in the Hamburg q32 on clay. The upset overturned the form book — Andrea Gaudenzi came in leading the head-to-head 1–0, but Mariano Zabaleta had been the form player, winning 3 of their last 8 on clay. Mariano Zabaleta claimed a first win over Andrea Gaudenzi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-05 | Gstaad | R16 | clay | Andrea Gaudenzi | 6-7 7-6 6-3 |
Averages over each player's completed matches in the selected window (200 vs 82). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About