| Singles | |
|---|---|
| 1985 Buenos Aires Grand Prix | |
| Champion |
|
| Runner-up |
|
| Final score | 6–4, 6–2 |
Martín Jaite defeated Diego Pérez 6–4, 6–2 to win the 1985 Buenos Aires Grand Prix singles competition. Guillermo Vilas was the champion but did not defend his title.