LOS ANGELES - Knowing a few more victories could help improve its seeding in the NCAA tournament, No. 15 UCLA went after Washington State from the opening tipoff.
Darren Collison scored 15 points in the Bruins' 64-53 victory Thursday night that extended their winning streak to five games in the Pac-10 tournament quarterfinals.
The Bruins (25-7) advanced to Friday's semifinals against crosstown rival Southern California, a 79-75 winner over California. The second-seeded Bruins swept the sixth-seeded Trojans (19-12) in the regular season.
"The team felt great. Everybody was really in it," Collison said. "When our intensity is at a high level, it's going to be real tough to beat us."
Washington State sure found that out.
Aron Baynes was the only player in double figures with 22 points for the Cougars (17-15), who shot 30 percent from the floor. The big Aussie was limited to six rebounds.
"I thought we got out-toughed today," Cougars coach Tony Bennett said. "How we needed to play didn't show itself until near the end. They came out ready and took it right to us."
Washington State used a 13-4 run over the end of the first half and start of the second to close to 33-24, capped by Taylor Rochestie's 3-pointer, his only field goal of the game.
With Collison smothering him, Rochestie was 1-for-11 for eight points, while freshman Klay Thompson was 2-of-11 for five points.
Rochestie scored a career-high 33 points in his team's 82-81 victory at Pauley Pavilion last month.
USC 79, California 75 - In Los Angeles, Taj Gibson had 21 points and 16 rebounds, Daniel Hackett made four free throws in the last 3.8 seconds, and Southern California never trailed in beating California 79-75 Thursday night in the quarterfinals of the Pac-10 tournament.
Freshman DeMar DeRozan added 17 points, 11 rebounds and three blocked shots and Hackett had 15 points, nine rebounds and seven assists for the sixth-seeded Trojans (19-12), who earned a berth in Friday night's semifinals and greatly enhanced their NCAA tournament chances.
Arizona 79, Washington State 72 - In Los Angeles, Ify Ebekwe had 23 points and 14 rebounds, Courtney Clements added 19 and Arizona defeated Washington State 79-72 in a first-round game of the Pac-10 tournament Thursday night. No. 9 seed Arizona will face No. 2 Stanford in a quarterfinal game on Friday.
The ninth-seeded Wildcats are 0-2 in both meetings against Stanford this season, but lost their last game to the Cardinal one week ago by only three points.
Washington 69, Oregon 43 - In Los Angeles, Washington coach Tia Jackson couldn't recall another time when her team played tenacious defense and competed hard the entire game.
So she's glad it happened during the Pac-10 tournament with the Huskies' season on the line.