1991 Virginia Slims of Los Angeles – Singles

Monica Seles was the defending champion and successfully defended her title, by defeating Kimiko Date 6–3, 6–1 in the final. Despite the win, Seles lost the world No. 1 spot to Steffi Graf, as her opponent needed to be in a high ranking in order to Seles to earn bonus points (Date was No. 112 while Gabriela Sabatini, defeated at the semifinals, was No. 3)

Date also became the first Japanese female player on reaching the final of any Tier II tournament.

Seeds
The first eight seeds received a bye to the second round. • # Monica Seles (champion)

• # 🇦🇷 Gabriela Sabatini (semifinals)

• # 🇪🇸 Arantxa Sánchez Vicario (semifinals)

• # 🇺🇸 Zina Garrison (second round)

• # Leila Meskhi (second round)

• # Helena Suková (quarterfinals)

• # 🇺🇸 Amy Frazier (third round)

• # 🇺🇸 Lori McNeil (quarterfinals)

• # (n/a)

• # Yayuk Basuki (third round)

• # 🇫🇷 Mary Pierce (third round)

• # 🇺🇸 Susan Sloane (first round)

• # 🇺🇸 Tami Whitlinger (first round)

• # Regina Rajchrtová (first round)

• # 🇸🇪 Catarina Lindqvist (third round)

• # 🇦🇺 Anne Minter (first round)