# 1985 Nabisco Grand Prix de Verano – Singles

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.

## Seeds

* Diego Pérez (final)
* Alejandro Ganzábal (first round)
* Martín Jaite (champion)
* Hans Gildemeister (first round)
* Horacio de la Peña (semifinals)
* Jimmy Brown (semifinals)
* Eduardo Bengoechea (first round)
* Roberto Argüello (quarterfinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Diego Pérez | 6 | 6 | | | | |
| WC/6 | Jimmy Brown | 2 | 4 | | | | |
| WC/6 | Jimmy Brown | 2 | 4 | 1 | Diego Pérez | 4 | 2 |
| | | | | 3 | Martín Jaite | 6 | 6 |
| 3 | Martín Jaite | 7 | 6 | 3 | Martín Jaite | 6 | 6 |
| 5 | Horacio de la Peña | 5 | 2 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | D Pérez | 6 | 6 | | | | | | | | | | | | | |
| | D Campos | 3 | 3 | | 1 | D Pérez | 6 | 6 | | | | | | | | |
| | A Fillol | 6 | 6 | | | A Fillol | 1 | 4 | | | | | | | | |
| Q | G Minutella | 2 | 2 | | | | | | 1 | D Pérez | 6 | 6 | | | | |
| | C Castellan | 6 | 4 | 3 | | | | | 8 | R Argüello | 3 | 3 | | | | |
| Q | G Tiberti | 1 | 6 | 6 | Q | G Tiberti | 0 | 5 | | | | | | | | |
| | E Martins | 3 | 2 | | 8 | R Argüello | 6 | 7 | | | | | | | | |
| 8 | R Argüello | 6 | 6 | | | | | | | | | | 1 | D Pérez | 6 | 6 |
| 4 | H Gildemeister | 6 | 3 | 4 | | | | | | | | | WC/6 | J Brown | 2 | 4 |
| WC | F Davín | 4 | 6 | 6 | WC | F Davín | 2 | 3 | | | | | | | | |
| | R Viver | 6 | 6 | | | R Viver | 6 | 6 | | | | | | | | |
| | J Canter | 3 | 1 | | | | | | | R Viver | 3 | 3 | | | | |
| | G Rivas | 2 | 6 | 4 | | | | | WC/6 | J Brown | 6 | 6 | | | | |
| | C Miniussi | 6 | 4 | 6 | | C Miniussi | 6 | 4 | | | | | | | | |
| | F Roese | 5 | 1 | | WC/6 | J Brown | 7 | 6 | | | | | | | | |
| WC/6 | J Brown | 7 | 6 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | E Bengoechea | 6 | 2 | 4 | | | | | | | | | | | | | |
| | F Maciel | 4 | 6 | 6 | | F Maciel | 6 | 7 | | | | | | | | | |
| | J Góes | 7 | 6 | | | J Góes | 3 | 5 | | | | | | | | | |
| Q | G Luza | 6 | 2 | | | | | | | | F Maciel | 3 | 1 | | | | |
| Q | G Garetto | 2 | 7 | 4 | | | | | | 3 | M Jaite | 6 | 6 | | | | |
| WC | G Guerrero | 6 | 5 | 6 | WC | G Guerrero | 5 | 1 | | | | | | | | | |
| | C Kist | 3 | 4 | | 3 | M Jaite | 7 | 6 | | | | | | | | | |
| 3 | M Jaite | 6 | 6 | | | | | | | | | | | 3 | M Jaite | 7 | 6 |
| 5 | H de la Peña | 6 | 6 | | | | | | | | | | | 5 | H de la Peña | 5 | 2 |
| | L Duncan | 2 | 4 | | 5 | H de la Peña | 7 | 6 | | | | | | | | | |
| | E Fernandez | 3 | 6 | 6 | | I Kley | 5 | 2 | | | | | | | | | |
| | I Kley | 6 | 4 | 7 | | | | | | 5 | H de la Peña | 6 | 6 | | | | |
| | M Ingaramo | 7 | 7 | | | | | | | | M Ingaramo | 3 | 4 | | | | |
| | P Rebolledo | 5 | 6 | | | M Ingaramo | 4 | 6 | 7 | | | | | | | | |
| | H Simonsson | 6 | 6 | | | H Simonsson | 6 | 1 | 5 | | | | | | | | |
| 2 | A Ganzábal | 4 | 4 | | | | | | | | | | | | | | |