Mariana Diaz Oliva defeated Maria Fernanda Landa 6-4 6-0 in the Tucuman 25K semi-final on clay. The result followed the form book — Mariana Diaz Oliva came in leading the head-to-head 3–0. Mariana Diaz Oliva extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-11 | Oporto 75K | R32 | clay | Mariana Diaz Oliva | 4-6 7-5 7-5 |
| 1997-06-09 | Budapest 50K | R16 | clay | Mariana Diaz Oliva | 6-7 6-4 6-1 |
| 1996-07-22 | Buenos Aires 25K | F | clay | Mariana Diaz Oliva | 6-3 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.