Guaruja 1990 ATP
Final
| Winner | Loser | Score | |
|---|---|---|---|
| Robbie Weiss | d. | Jaime Yzaga | 3-6 7-6 6-3 |
Semifinals
| Winner | Loser | Score | |
|---|---|---|---|
| Robbie Weiss | d. | Jacco Eltingh | 7-6 4-6 7-6 |
| Jaime Yzaga | d. | Danilo Marcelino | 6-4 3-6 7-6 |
Quarterfinals
| Winner | Loser | Score | |
|---|---|---|---|
| Robbie Weiss | d. | Miguel Nido | 6-4 6-3 |
| Jacco Eltingh | d. | Joao Cunha Silva | 7-5 7-6 |
| Jaime Yzaga | d. | Chris Garner | 7-5 7-5 |
| Danilo Marcelino | d. | Luiz Mattar | 6-7 6-2 7-6 |
Round of 16
| Winner | Loser | Score | |
|---|---|---|---|
| Miguel Nido | d. | Jonathan Canter | 7-6 0-6 7-6 |
| Robbie Weiss | d. | Eduardo Bengoechea | 6-4 6-4 |
| Jacco Eltingh | d. | Mark Koevermans | 6-7 7-5 7-5 |
| Joao Cunha Silva | d. | Pedro Rebolledo | 6-4 6-2 |
| Chris Garner | d. | Cassio Motta | 7-5 7-6 |
| Jaime Yzaga | d. | Marcelo Saliola | 6-2 7-5 |
| Danilo Marcelino | d. | Javier Frana | 7-6 6-4 |
| Luiz Mattar | d. | Bruno Oresar | 7-5 2-6 6-4 |
Round of 32
| Winner | Loser | Score | |
|---|---|---|---|
| Jonathan Canter | d. | Franco Davin | 6-2 3-6 6-1 |
| Miguel Nido | d. | German Lopez | 6-3 6-7 6-1 |
| Eduardo Bengoechea | d. | Martin Wostenholme | 6-0 6-1 |
| Robbie Weiss | d. | Xavier Daufresne | 6-0 4-6 6-4 |
| Mark Koevermans | d. | Jaime Oncins | 6-4 7-5 |
| Jacco Eltingh | d. | Bart Wuyts | 6-3 6-3 |
| Pedro Rebolledo | d. | Andrew Sznajder | 6-1 6-2 |
| Joao Cunha Silva | d. | Roberto Azar | 6-3 7-6 |
| Cassio Motta | d. | Fernando Roese | 6-3 3-6 6-2 |
| Chris Garner | d. | Mikael Pernfors | 6-3 6-0 |
| Marcelo Saliola | d. | Paul Vojtischek | 4-6 6-1 6-2 |
| Jaime Yzaga | d. | Marcos Aurelio Gorriz | 6-2 6-2 |
| Javier Frana | d. | Nuno Marques | 7-6 6-3 |
| Danilo Marcelino | d. | Tim Wilkison | 6-3 6-4 |
| Bruno Oresar | d. | Stefano Pescosolido | 6-4 6-2 |
| Luiz Mattar | d. | Pablo Arraya | 6-3 6-2 |