Mariana Diaz Oliva defeated Jolene Watanabe Giltz 6-2 6-2 in the Roland Garros q64 on clay. The result followed the form book — Mariana Diaz Oliva came in leading the head-to-head 1–0, defending last year's round of 64. Mariana Diaz Oliva extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-05-24 | Roland Garros | R128 | clay | Mariana Diaz Oliva | 6-0 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.