Romina Ottoboni defeated Natalia Gussoni 6-4 3-6 6-4 in the Sao Jose Dos Campos 10K round of 32 on clay. The upset overturned the form book — Natalia Gussoni came in leading the head-to-head 1–0, but Romina Ottoboni had been the form player, winning 4 of their last 6 on clay. Romina Ottoboni claimed a first win over Natalia Gussoni in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-09-04 | Buenos Aires 10K | F | clay | Natalia Gussoni | 7-5 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.