# 1990 Banespa Open – Singles

Luiz Mattar was the defending champion, and retained his title defeating Andrew Sznajder 6–4, 6–4, in the final.

## Seeds

* Luiz Mattar (champion)
* Andrew Sznajder (final)
* Cássio Motta (second round)
* Eduardo Bengoechea (first round)
* Martin Laurendeau (quarterfinals)
* Martin Wostenholme (semifinals)
* Brad Pearce (second round)
* Horacio de la Peña (first round)

## 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 | Semifinals | Final | Final | Final | Final |
| 1 | Luiz Mattar | 6 | 6 | | | | | |
| 6 | Martin Wostenholme | 3 | 1 | | | | | |
| 6 | Martin Wostenholme | 3 | 1 | | 1 | Luiz Mattar | 6 | 6 |
| | | | | | 2 | Andrew Sznajder | 4 | 4 |
| Q | Brian Garrow | 4 | 6 | 4 | 2 | Andrew Sznajder | 4 | 4 |
| 2 | Andrew Sznajder | 6 | 1 | 6 | | | | |

### Top 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | L Mattar | 1 | 7 | 6 | | | | | | | | | | | | | | |
| WC | J Oncins | 6 | 5 | 1 | 1 | L Mattar | 6 | 6 | | | | | | | | | | |
| | R Argüello | 6 | 6 | | | R Argüello | 3 | 3 | | | | | | | | | | |
| Q | P Albano | 3 | 0 | | | | | | | 1 | L Mattar | 4 | 6 | 6 | | | | |
| | P Vojtíšek | 6 | 6$^5$ | 7 | | | | | | | P Vojtíšek | 6 | 1 | 3 | | | | |
| | N Odizor | 3 | 7$^7$ | 5 | | P Vojtíšek | 6 | 5 | 6 | | | | | | | | | |
| | O Delaître | 4 | 4 | | 7 | B Pearce | 3 | 7 | 1 | | | | | | | | | |
| 7 | B Pearce | 6 | 6 | | | | | | | | | | | | 1 | L Mattar | 6 | 6 |
| 3 | C Motta | 6 | 6 | | | | | | | | | | | | 6 | M Wostenholme | 3 | 1 |
| | D Cassidy | 4 | 1 | | 3 | C Motta | 6$^6$ | 3 | | | | | | | | | | |
| Q | M Ingaramo | 4 | 5 | | | S Colombo | 7$^8$ | 6 | | | | | | | | | | |
| | S Colombo | 6 | 7 | | | | | | | | S Colombo | 2 | 2 | | | | | |
| | A Hocevar | 1 | 7 | 4 | | | | | | 6 | M Wostenholme | 6 | 6 | | | | | |
| | N Brown | 6 | 5 | 6 | | N Brown | 6$^1$ | 2 | | | | | | | | | | |
| | R Osterthun | 6 | 5 | 4 | 6 | M Wostenholme | 7$^7$ | 6 | | | | | | | | | | |
| 6 | M Wostenholme | 3 | 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 | Semifinals |
| 5 | M Laurendeau | 6 | 3 | 7 | | | | | | | | | | | | | | |
| | B Shelton | 2 | 6 | 5 | 5 | M Laurendeau | 6 | 3 | 6 | | | | | | | | | |
| | L Lavalle | 6 | 6$^5$ | 7$^9$ | | L Lavalle | 1 | 6 | 2 | | | | | | | | | |
| | G Markus | 4 | 7$^7$ | 6$^7$ | | | | | | 5 | M Laurendeau | 3 | 3 | | | | | |
| WC | D Marcelino | 3 | 1 | | | | | | | Q | B Garrow | 6 | 6 | | | | | |
| | C Pridham | 6 | 6 | | | C Pridham | 6 | 5 | 1 | | | | | | | | | |
| Q | B Garrow | 6 | 4 | 6 | Q | B Garrow | 2 | 7 | 6 | | | | | | | | | |
| 4 | E Bengoechea | 0 | 6 | 3 | | | | | | | | | | Q | B Garrow | 4 | 6 | 4 |
| 8 | H de la Peña | 3 | 3 | | | | | | | | | | | 2 | A Sznajder | 6 | 1 | 6 |
| | P Baur | 6 | 6 | | | P Baur | 6 | 2 | 6 | | | | | | | | | |
| | G Pozzi | 6 | 7$^7$ | | | G Pozzi | 2 | 6 | 3 | | | | | | | | | |
| Q | J Daher | 2 | 6$^2$ | | | | | | | | P Baur | 5 | 1 | | | | | |
| | F Roese | 6 | 6 | | | | | | | 2 | A Sznajder | 7 | 6 | | | | | |
| | P Ballauff | 2 | 1 | | | F Roese | 3 | 3 | | | | | | | | | | |
| WC | J Frana | 3 | 1 | | 2 | A Sznajder | 6 | 6 | | | | | | | | | | |
| 2 | A Sznajder | 6 | 6 | | | | | | | | | | | | | | | |