Lackey, replaced by freshman Krista Warren in the starting lineup, scored six straight points early in the second half to pull the Wildcats (15-3, 4-2 Pac-10) to a 43-27 lead.

She then made four free throws and an offensive put-back just after Southern California (7-8, 2-3) had cut a 16-point lead to three with 6:58 left.

Warren, in her first collegiate start, scored 15 points including Arizona's initial six points of the game.

The change came after Wildcats coach Joan Bonvicini questioned the intensity of several players in a 79-68 loss to 12th-ranked UCLA here Thursday night.