Mariana Diaz Oliva defeated Adriana Serra Zanetti 7-6 6-4 in the Orbetello 25K semi-final on clay. The upset overturned the form book — Adriana Serra Zanetti came in leading the head-to-head 2–0. Mariana Diaz Oliva claimed a first win over Adriana Serra Zanetti in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-01-18 | Australian Open | R128 | hard | Adriana Serra Zanetti | 6-1 6-2 |
| 1998-04-06 | Estoril 75K | R32 | clay | Adriana Serra Zanetti | 6-0 0-6 6-3 |
Averages over each player's completed matches in the selected window (22 vs 2). 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