LOS ANGELES - A technical foul against senior co-captain Lodrick Stewart undid everything Southern California had built for 75 minutes against No. 2 UCLA.
Stewart's angry spike sent the ball sky-high with 4 1/5 minutes left and with it went USC's hopes of upsetting its crosstown rival.
Darren Collison tied his career high with 17 points and the Bruins capitalized on Stewart's impulsiveness by scoring five straight points to win 70-65 Wednesday.
With a victory, the Trojans could have tied UCLA for the Pac-10 lead, but instead they dropped to third behind idle Washington State.
"We're encouraged we can play the second-ranked team in the nation for 75 minutes, but not 80," said USC coach Tim Floyd, who refused to discuss the officiating.
UCLA extended its Pauley Pavilion winning streak to 18 games as the Pac-10's only undefeated team at home.
No. 1 Florida 71, Georgia 61
At Athens, Ga., Corey Brewer scored 18 points, Al Horford added 17 and top-ranked Florida stretched its winning streak to 15 games.
Florida also extended its best start ever in the league by sweeping its season series with the Bulldogs. The Gators won 67-51 in Gainesville a month ago, dominating over the final 20 minutes after Georgia led at halftime.
No. 4 Wisconsin 71, Penn State 58
At State College, Pa., Alando Tucker scored 24 points, Michael Flowers added 12 and Wisconsin pulled away after halftime to beat Penn State.
The Nittany Lions (10-12, 1-8 Big Ten) hung close for much of the game thanks to an active zone and energetic forward Jamelle Cornley, who finished with 20 points. The Badgers (23-2, 9-1) at times couldn't hit shots when they did find space.
No. 5 North Carolina 79, No. 16 Duke 73
At Durham, N.C., freshman Brandan Wright scored 19 points while Tyler Hansbrough added 16 to lead North Carolina.
Rookie Ty Lawson added 15 points for the Tar Heels (21-3, 7-2 Atlantic Coast Conference), who trailed by 10 points early in the second half before finally going ahead to stay in the final minutes.
No. 7 Pittsburgh 60, West Virginia 47
At Morgantown, W.Va., Sam Young scored a career-high 21 points to help Pittsburgh hand West Virginia its first home loss of the season.
Pittsburgh showed no signs of rust from a nine-day layoff and had no trouble scoring inside on the Mountaineers, who were held to a season-low for points.
No. 9 Kansas 97, Kansas St. 70
At Lawrence, Kan., Brandon Rush scored 18 points and Kansas routed Kansas State in a rough and spirited renewal of a long rivalry that's been re-energized with the arrival of Bob Huggins.
It was the first trip into Allen Fieldhouse for Huggins, who took over the long-woeful Kansas State program this year, and the raucous sellout crowd of 16,300 gave him less than a warm welcome.
No. 11 Marquette 67, Rutgers 47
At Milwaukee, Ousmane Barro had 11 points and 11 rebounds to lead No. 11 Marquette victory.
The Golden Eagles opened the conference season with losses to Providence and Syracuse, but are unbeaten since, winning eight straight games.
Oklahoma 67, No. 17 Oklahoma St. 60
At Norman, Okla., Nate Carter scored six of his 18 points in the final minutes to help Oklahoma stave off Oklahoma State's late rally in the Bedlam rivalry.
JamesOn Curry's jumper started OSU's comeback from a nine-point deficit, and Mario Boggan brought the Cowboys within five when he tipped in Curry's miss to complete a three-point play.
No. 18 Alabama 80, Mississippi State 79
At Tuscaloosa, Ala., Ronald Steele drove the length of the court for a layup with 6.7 seconds left to give Alabama a victory over Mississippi State.
Ben Hansbrough hit the second of two free throws with 14 seconds to play to give the Bulldogs a 79-78 lead. Steele took the inbounds pass, took the ball across midcourt, then accelerated past Jamont Gordon for the winning basket.
No. 20 Kentucky 95, South Carolina 89
At Lexington, Ky., Ramel Bradley scored 21 points and Bobby Perry added a season-high 18 to help Kentucky.
Kentucky built a 50-28 halftime lead - its highest first half point total since getting 60 against Florida A&M in the first round of the 2004 NCAA tournament.
No. 21 So. Illinois 60, Bradley 50
At Carbondale, Ill., Tony Young scored 25 points to lift No. 21 Southern Illinois over late-charging Bradley and remain tied atop the Missouri Valley Conference.
Randal Falker added 13 points and 12 rebounds for Southern Illinois, which led by as many as 19 in the first half but saw its margin dwindle to five in the closing minutes.
No. 22 Georgetown 73, Louisville 65
At Louisville, Ky., Roy Hibbert scored 20 points and grabbed 11 rebounds to lead Georgetown to a win over Louisville.
Jeff Green scored 16 points and DaJuan Summers added 13 as the surging Hoyas won their sixth straight game, with each win coming by at least eight points.
Notre Dame 64, No. 17 Louisville 55
At South Bend, Ind., Charel Allen scored 21 points and Notre Dame used a big run late in the second half to overcome a 12-point deficit and upset Louisville.
No. 15 Baylor 80, Texas Tech 67
At Lubbock, Texas, Jhasmin Player scored 22 points to lead Baylor, which has 20 wins for the seventh straight season.
No. 16 Texas A&M 69, Missouri 63
At Columbia, Mo., Takia Starks scored 21 points and 16th-ranked Texas A&M weathered a Missouri rally for its fifth straight win.
No. 18 Bowling Green 86, Ball State 76
At Bowling Green, Ohio, reserve Amber Flynn had 18 points and eight rebounds, Kate Achter added 18 points and Bowling Green held off a late comeback.
No. 21 Nebraska 62, Kansas St. 55
At Manhattan, Kan., Kiera Hardy scored 13 points to lead Nebraska to its fourth straight win and seventh in eight games.