Rossana De Los Rios defeated Sabrina Valenti 6-3 7-5 in the Buenos Aires 25K round of 16 on clay. The result followed the form book — Rossana De Los Rios came in leading the head-to-head 1–0. Rossana De Los Rios extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-08-30 | San Juan 10K | R32 | clay | Rossana De Los Rios | 6-4 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.