1989 Guarujá Open

The 1989 Guarujá Open was a men's tennis tournament held in Guarujá in Brazil and played on outdoor clay courts. It was part of the 1989 Nabisco Grand Prix. The tournament took place from 6 February through 13 February 1989. First-seeded Luiz Mattar won his second consecutive singles title at the event.

Singles
🇧🇷 Luiz Mattar defeated 🇺🇸 Jimmy Brown 7–6, 6–4
 * It was Mattar's 1st title of the year and the 5th of his career.

Doubles
🇧🇷 Ricardo Acioly / 🇧🇷 Dacio Campos defeated 🇧🇷 César Kist / 🇧🇷 Mauro Menezes 7–6, 7–6
 * It was Acioly's only title of the year and the 3rd of his career. It was Campos' only title of the year and the 1st of his career.