1990 Lipton International Players Championships – Women's singles

Monica Seles defeated Judith Wiesner in the final, 6–1, 6–2 to win the women's singles tennis title at the 1990 Miami Open.

Gabriela Sabatini was the defending champion, but lost in the quarterfinals to Conchita Martínez.

Seeds
All seeds received a bye to the second round. • # 🇦🇷 Gabriela Sabatini (fourth round)

• # 🇺🇸 Zina Garrison-Jackson (second round)

• # Monica Seles (winner)

• # Manuela Maleeva-Fragniere (quarterfinals)

• # 🇪🇸 Conchita Martínez (semifinals)

• # Helena Suková (second round)

• # Jana Novotná (fourth round)

• # 🇨🇦 Helen Kelesi (third round)

• # 🇫🇷 Nathalie Tauziat (semifinals)

• # 🇮🇹 Raffaella Reggi (fourth round)

• # 🇺🇸 Amy Frazier (second round)

• # 🇵🇪 Laura Gildemeister (second round)

• # Rosalyn Fairbank-Nideffer (fourth round)

• # 🇺🇸 Gretchen Rush (fourth round)

• # 🇦🇹 Judith Wiesner (final)

• # 🇺🇸 Anne Smith (second round)

• # 🇸🇪 Catarina Lindqvist (second round)

• # Radomira Zrubáková (second round)

• # Larisa Savchenko (second round)

• # 🇺🇸 Susan Sloane (fourth round)

• # Claudia Porwik (quarterfinal)

• # 🇫🇷 Isabelle Demongeot (second round)

• # Sylvia Hanika (second round)

• # 🇳🇿 Belinda Cordwell (second round)

• # 🇦🇺 Anne Minter (second round)

• # 🇭🇺 Andrea Temesvári-Trunkos (second round)

• # Manon Bollegraf (second round)

• # 🇺🇸 Betsy Nagelsen (second round)

• # Regina Rajchrtová (second round)

• # 🇺🇸 Patty Fendick (third round)

• # 🇺🇸 Kathy Rinaldi (third round)