1989 Guarujá Open – Singles
Introduction Luiz Mattar was the defending champion and won in the final 7–6, 6–4 against Jimmy Brown.
Seeds A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.#  '''Luiz Mattar (champion)'''#  Lawson Duncan ''(first round)''#  Jaime Yzaga ''(semifinals)''#  Cássio Motta ''(quarterfinals)''#  Javier Frana ''(first round)''#  Eduardo Bengoechea ''(quarterfinals)''#  Todd Witsken ''(quarterfinals)''#  Danilo Marcelino ''(semifinals)''
Draw
External links *  1989 Guarujá Open Draw