WSU had to hold off the top-20 Ducks to avoid the reverse sweep.
Magda Jehlarova’s 21 kills led the Cougs as they completed the reverse sweep to stay alive in the race for the Pac-12 title.
After a tough loss on Friday, the Cougars responded with a dominant performance at the Galen Center.
A dominant third set gave WSU its fourth consecutive sweep on the road.
Cougar volleyball earned its second straight sweep by dominating the Wildcats.
The Cougars overcame a 3-0 deficit in the fifth set to knock off No. 6 Washington. It was their second straight upset of a ranked opponent.
Washington State volleyball opened up Pac-12 play with an impressive home sweep of previously undefeated Colorado.