Adriana Serra Zanetti defeated Mariana Diaz Oliva 6-1 6-2 in the Australian Open round of 128 on hard. The upset overturned the form book — Mariana Diaz Oliva came in defending last year's round of 128. Adriana Serra Zanetti extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-30 | Orbetello 25K | SF | clay | Mariana Diaz Oliva | 7-6 6-4 |
| 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 (2 vs 22). 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