All-Pac-12 guard Charlisse Leger-Walker suffered a knee injury in the second half of Washington State's 85-82 upset of No. 2 UCLA Sunday at Pauley Pavilion.
Cougars coach Kamie Ethridge said Leger-Walker was examined by doctors, but they will wait for the MRI before knowing anything definitive.
"I don't think it looks good. We'll wait and see what the picture looks like. But, you know, it generally doesn't ever end up well," Ethridge said. "You've just got to be patient and then figure out the next plans for her."
Leger-Walker -- an Associated Press All-America honorable mention selection last season -- suffered the non-contact injury with 7:30 remaining in the third quarter and with the Cougars holding a 48-32 lead. The senior guard was taken to the locker room and had 17 points.
"I think she was trying to draw a little contact on a breakaway and you know, the way she plants and things like that and really good players," Ethridge said. "It's a move she makes, you know, thousands of times a year. So, I don't think it was anything at all other than going hard for the basket."
Despite not having their primary ball handler for most of the second half, the Cougars (15-6, 4-4 Pac-12) held on despite nearly blowing a 20-point lead.
Bella Murekatete had 20 points and eight rebounds, including a pair of free throws with 18 seconds remaining to put the Cougars up by three.
After a timeout, UCLA had a final chance to send it to overtime but the Bruins missed all three potential tying 3-pointers in the final 11 seconds, including one by Kiki Rice that went off the glass as time expired.
It was the highest-ranked team the Cougars have defeated in program history, eclipsing the 66-58 win over then-No. 3 Utah in last year's Pac-12 Tournament.
"To beat No. 2, that's a program-changer," Ethridge said. "It's not something we talked about before, but I love how we competed."
The Cougars shot 60.5% from the field for the first three quarters but were 3-of-10 in the final 10 minutes. However, they were 14-of-18 from the foul line in the fourth and 27-of-34 for the game.
Eleonora Villa added 18 points and Tara Wallack had 14 points, including 12-of-14 from the line.
Rice had 25 points and Charisma Osbourne added 20 and Londynn Jones 19 for UCLA (16-3, 5-3), which has dropped two of its last three.
UCLA trailed 52-32 early in the second half but got the deficit down to 12 at the end of the third quarter. The Bruins opened the fourth on a 15-7 rally that included four 3-pointers to get within 72-68.
A pair of free throws by Villa put Washington State up 81-75 with 54 seconds left, but the Bruins made a final late push to make it a one-possession game late. Rice had five points during a 7-2 run, including a pair of free throws with 19 seconds remaining as Washington State held on to an 83-82 advantage.
"I think throughout the entire game, even though we were down 16 at half, we had a consistent belief that we would find a way to come out in the second half and find a way to win," Rice said.
Leger-Walker and Murekatete combined to go 12-of-16 from the field in the first half as Washington State had a 46-30 advantage at halftime.
Leger-Walker's injury not only impacts Washington State, but New Zealand women's basketball team. She was slated to be with the Tall Ferns with the Olympic qualifying tournament starting on Feb. 8.
The Associated Press contributed to this report.