1991 Mazda Classic – Singles

Steffi Graf was the defending champion, but did not compete this year.

Jennifer Capriati won the title by defeating Monica Seles 4–6, 6–1, 7–6(7–2) in the final.

Seeds
The first four seeds received a bye into the second round. • # Monica Seles (final)

• # 🇪🇸 Conchita Martínez (semifinals)

• # Manuela Maleeva-Fragnière (quarterfinals)

• # 🇺🇸 Jennifer Capriati (champion)

• # 🇺🇸 Zina Garrison (quarterfinals)

• # 🇫🇷 Nathalie Tauziat (semifinals)

• # 🇦🇹 Barbara Paulus (second round)

• # 🇵🇪 Laura Gildemeister (first round)