Senior Nicole Long clinched the 4-3 nail biter for Oregon in Boulder with a 3-6, 7-5, 6-3 win in singles play.
The Oregon women's tennis team fell to Utah, 5-2, on Friday in its opening match of the weekend in Salt Lake City.
Oregon resumes Pac-12 play this weekend at Utah and No. 56 Colorado before returning home.
Marlou Kluiving won her 12th-straight match on Saturday, but it wasn't enough as Oregon fell to BYU, 4-3.
Oregon defeated its first ranked opponent of the year in a 5-2 win over No. 69 Utah State on Friday.
Oregon makes its first trip to the state of Utah for a pair of matches against Utah State and BYU this weekend.
The Oregon women's tennis team grinded their way to a 4-3 win over Washington State Sunday afternoon at the Student Tennis Center outdoor courts.
LIVE STATS: Washington State Cougars (10-2) at Oregon Ducks (5-3)
The Oregon women's tennis team and first-year head coach are set to enter the Pac-12 season come noon time on Sunday, March 8.
The Ducks fought valiantly against the Pilots, but eventually fell 4-3 on Friday at the Student Tennis Center.
Oregon will put its four-match win streak on the line at 2 p.m. on Friday when the Ducks entertain in-state rival Portland.
Oregon swept its first dual match in over year with the 7-0 win over Santa Clara on Saturday to record its fourth-straight victory.