By surface
| Surface | Carlos Rivas | Gaston Tonello |
|---|---|---|
| Clay | 2 | 1 |
All meetings (3)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1986-05-19 | WTA | Lugano | Round of 64 | Clay | Patricia Medrado | 6-4 | 6-7 | 5-7 | ||
| 1984-07-15 | WTA | Fed Cup WG ConR: BRA vs JPN | Round Robin | Clay | Etsuko Inoue | 4-6 | 6-2 | 3-6 | ||
| 1984-05-21 | WTA | Perugia | Round of 64 | Clay | Patricia Medrado | 3-6 | 1-6 |