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

 * 1) 🇧🇷 Luiz Mattar (champion)
 * 2) 🇨🇦 Andrew Sznajder (final)
 * 3) 🇧🇷 Cássio Motta (second round)
 * 4) 🇦🇷 Eduardo Bengoechea (first round)
 * 5) 🇨🇦 Martin Laurendeau (quarterfinals)
 * 6) 🇨🇦 Martin Wostenholme (semifinals)
 * 7) 🇺🇸 Brad Pearce (second round)
 * 8) 🇦🇷 Horacio de la Peña (first round)