The 1990 Arizona Classic was a women's tennis tournament played on outdoor hard courts at the Scottsdale Princess in Scottsdale, Arizona in the United States and was part of Tier IV of the 1990 WTA Tour. It was the fifth edition of the tournament and was held from October 15 through October 21, 1990. First-seeded Conchita Martínez won the singles title and earned $27,000 first-prize money.[1] [2]
Conchita Martínez defeated 
Marianne Werdel 7–5, 6–1
Elise Burgin / 
Helen Kelesi defeated Sandy Collins / Ronni Reis 6–4, 6–2