The 1986 Brazilian Open was a women's tennis tournament played on outdoor clay courts in São Paulo in Brazil and was part of the Category 1 tier of the 1987 Virginia Slims World Championship Series. It was the fourth edition of the tournament and was held from 8 December through 15 December 1986. Eighth-seeded Vicki Nelson-Dunbar won the singles title.
Finals.
Singles.
 Vicki Nelson-Dunbar defeated Jenny Klitch 6–2, 7–6(7–1)
Doubles.
 Neige Dias / Patricia Medrado defeated Laura Arraya / Petra Huber 6–4, 4–6, 7–6(8–6)