1991 Arizona Classic – Singles

Conchita Martínez was the defending champion, but did not compete this year.

Sabine Appelmans won the title by defeating Chanda Rubin 7–5, 6–1 in the final.

Seeds
• # 🇺🇸 Gigi Fernández (second round)

• # 🇫🇷 Julie Halard (semifinals)

• # 🇧🇪 Sabine Appelmans (champion)

• # 🇺🇸 Amy Frazier (second round)

• # 🇺🇸 Marianne Werdel (first round)

• # Yayuk Basuki (first round)

• # 🇩🇪 Barbara Rittner (first round)

• # 🇺🇸 Debbie Graham (first round)