Mariana Diaz Oliva defeated Antonella Serra Zanetti 5-7 6-0 6-2 in the Orbetello 25K round of 32 on clay. The upset overturned the form book — Antonella Serra Zanetti came in leading the head-to-head 1–0. Mariana Diaz Oliva claimed a first win over Antonella Serra Zanetti in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-11-10 | Eugene OR 50K | R32 | hard | Antonella Serra Zanetti | 6-4 6-0 |
Averages over each player's completed matches in the selected window (22 vs 25). 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