1990 Virginia Slims of California – Singles

Zina Garrison was the defending champion, but lost in the semifinals to Monica Seles.

Seles won the title by defeating Martina Navratilova 6–3, 7–6(7–5) in the final.

Seeds
• # 🇺🇸 Martina Navratilova (final)

• # Monica Seles (champion)

• # 🇺🇸 Zina Garrison (semifinals)

• # 🇦🇹 Barbara Paulus (second round)

• # 🇺🇸 Amy Frazier (second round)

• # 🇦🇹 Judith Wiesner (second round)

• # 🇵🇪 Laura Gildemeister (second round)

• # 🇺🇸 Anne Smith (second round)