Kelsey Plum had 23 points, Talia Walton added 22 and
Washington (13-4, 4-2
Washington announced on its website Wednesday that starter Brianna Ruiz would miss the rest of the season with a torn ACL in her left knee. She was injured going for a rebound in Sunday's win over
Alexus Atchley, who replaced Ruiz, made two 3-pointers and scored all eight of her points in the first five minutes as Washington opened with a 14-0 run.
Kari Korver scored all of her 12 points on four 3-pointers in the second quarter to pull the Bruins within 30-26 at the half. Nirra Fields added 11 points.
Maria Kostourkova and Louise Brown added 10 points each for Washington State (12-5, 3-3 Pac-12).
Dawnyelle Awa assisted Hristova's weak-side cut to make it 68-61 with 1:41 left and the Cougars made 5 of 10 free throws while USC (14-3, 2-3) missed its last seven field-goal attempts.
The Cougars outscored USC 23-11 in the third quarter to take a 54-49 lead. The Trojans closed within one with the first four points of the fourth quarter, but Washington State answered with a 7-0 run to lead 61-53.
It was Washington State's first win against a ranked opponent since a 70-64 victory on Nov. 29, 2013, over No. 10 Maryland.
Kristen Simon had 19 points to lead USC. Sadie Edwards, Aliyah Mazyck and Temi Fagbenle added 10 each.
at No. 10
Elisha Davis added 11 points for the Sun Devils (14-3, 4-0). They limited Colorado (5-11, 0-5) to 26 percent shooting and remained the only unbeaten team in Pac-12 play.
Zoe Beard-Fails and Kennedy Leonard each scored nine points for Colorado.
No. 11 Stanford 64, at
Kaylee Johnson scored 16 points and had five of 11 blocks for the Cardinal (14-3, 4-1 Pac-12).