Carissa Crutchfield hit a 3-pointer with 7:41 to play, pulling Arizona within three, 52-49, but the Wildcats made just 1 of 8 field goals the rest of the way and USC (19-12) held on for the win.
The Women of Troy will play No. 4 seed Arizona State (22-8) in the quarterfinals on Friday.
Alexyz Vaioletama pulled down 12 rebounds and Cassie Harberts grabbed 11 for USC, which out-rebounded Arizona (5-25) 41-30, including 12-4 on the offensive glass. Kate Oliver scored 12 in the win.
Kama Griffitts paced the Wildcats with 13 points and seven rebounds. Crutchfield added 12 points and LaBrittney Jones scored 10.
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