ATP 250 · 1990-02-05 · draw of 32
Guaruja 1990
HardFinal
| 🇦🇷 Martin Jaite | d. | 🇧🇷 Luiz Mattar | 3-6 6-4 6-3 | H2H |
Semifinals
| 🇧🇷 Luiz Mattar | d. | 🇦🇷 Eduardo Bengoechea | 6-4 6-2 | H2H |
| 🇦🇷 Martin Jaite | d. | 🇧🇷 Alexandre Hocevar | 6-2 3-6 6-3 | H2H |
Quarterfinals
| 🇧🇷 Alexandre Hocevar | d. | 🇧🇷 Cassio Motta | 6-4 6-1 | H2H |
| 🇧🇷 Luiz Mattar | d. | 🇧🇷 Ivan Kley | 6-3 6-2 | H2H |
| 🇦🇷 Martin Jaite | d. | 🇩🇪 Paul Vojtischek | 7-5 6-2 | H2H |
| 🇦🇷 Eduardo Bengoechea | d. | 🇺🇸 Jay Berger | 7-5 6-0 | H2H |
Round of 16
| 🇩🇪 Paul Vojtischek | d. | 🇦🇷 Horacio de la Pena | 7-6 3-1 RET | H2H |
| 🇧🇷 Ivan Kley | d. | 🇵🇪 Alejandro Aramburu | 6-3 6-4 | H2H |
| 🇧🇷 Alexandre Hocevar | d. | Mario Tabares | 5-7 6-0 6-4 | H2H |
| 🇦🇷 Eduardo Bengoechea | d. | 🇩🇪 Peter Ballauff | 6-4 7-5 | H2H |
| 🇧🇷 Cassio Motta | d. | Miguel Nido | 6-4 6-1 | H2H |
| 🇧🇷 Luiz Mattar | d. | 🇩🇪 Harald Rittersbacher | 4-6 7-6 6-4 | H2H |
| 🇦🇷 Martin Jaite | d. | 🇺🇸 John Sobel | 6-1 6-2 | H2H |
| 🇺🇸 Jay Berger | d. | 🇦🇷 Gabriel Markus | 6-3 6-0 | H2H |
Round of 32
| 🇩🇪 Paul Vojtischek | d. | 🇺🇸 Jeff Tarango | 6-4 6-3 | H2H |
| 🇺🇸 John Sobel | d. | 🇦🇷 Roberto Arguello | 5-7 6-4 6-4 | H2H |
| 🇩🇪 Harald Rittersbacher | d. | 🇨🇱 Pedro Rebolledo | 6-4 6-0 | H2H |
| Miguel Nido | d. | 🇧🇷 Danilo Marcelino | 6-4 6-0 | H2H |
| 🇦🇷 Gabriel Markus | d. | 🇧🇷 Mauro Menezes | 6-7 6-1 7-5 | H2H |
| 🇧🇷 Ivan Kley | d. | 🇧🇷 Joao Zwetsch | 3-6 6-4 6-4 | H2H |
| 🇧🇷 Alexandre Hocevar | d. | 🇧🇷 Otavio Della | 6-0 6-4 | H2H |
| 🇦🇷 Horacio de la Pena | d. | 🇦🇷 Guillermo Rivas | 6-2 6-3 | H2H |
| 🇩🇪 Peter Ballauff | d. | 🇦🇷 Francisco Yunis | 2-6 6-4 6-1 | H2H |
| 🇵🇪 Alejandro Aramburu | d. | 🇨🇦 Martin Wostenholme | 2-6 6-4 6-1 | H2H |
| 🇦🇷 Eduardo Bengoechea | d. | 🇧🇷 Jaime Oncins | 6-2 6-4 | H2H |
| 🇧🇷 Cassio Motta | d. | 🇩🇪 Christian Saceanu | 3-6 6-2 6-1 | H2H |
| 🇧🇷 Luiz Mattar | d. | 🇧🇷 Fernando Roese | 7-5 6-3 | H2H |
| Mario Tabares | d. | 🇵🇪 Jaime Yzaga | 7-6 7-6 | H2H |
| 🇦🇷 Martin Jaite | d. | 🇦🇷 Javier Frana | 7-6 6-3 | H2H |
| 🇺🇸 Jay Berger | d. | 🇧🇷 Nelson Aerts | 6-4 6-1 | H2H |