1990 Volvo San Francisco – Singles

Brad Gilbert was the defending champion, but lost in the first round to Gary Muller.

Andre Agassi won the title by defeating Todd Witsken 6–1, 6–3 in the final.

Seeds
• # 🇺🇸 Brad Gilbert (first round)

• # 🇺🇸 Andre Agassi (champion)

• # 🇺🇸 Kevin Curren (first round)

• # Christo van Rensburg (quarterfinals)

• # 🇺🇸 Jim Grabb (semifinals)

• # 🇺🇸 Scott Davis (second round)

• # 🇺🇸 Richey Reneberg (quarterfinals)

• # 🇺🇸 Paul Annacone (quarterfinals)