CHICAGO - Greg Oden scored 22 points to help the Buckeyes (28-3) win their 15th straight game, turning back the Wolverines (21-12) in the Big Ten quarterfinals.

No. 3 Wisconsin 70, Michigan State 57 CHICAGO

Alando Tucker scored 21 points to power the Badgers (28-4) past the Spartans (22-11) in the Big Ten quarterfinals.

No. 6 Florida 74, Auburn 57 ATLANTA

Taurean Green scored 19 points to help the Gators (27- 5) romp past the Tigers (18-13) in the Southeastern quarterfinals.

No. 5. Memphis 71, Tulane 49 MEMPHIS, Tenn.

Chris Douglas-Roberts scored 17 points as the Tigers (29-3) swamped the Green Wave (17-13) in the Conference USA semifinals.

Jeremy Hunt added 10 points off the bench for Memphis.

No. 8 North Carolina 73, Florida State 58 TAMPA, Fla.

Wayne Ellington scored 18 points as the Tar Heels (26-6) beat the Seminoles (20-12) in the Atlantic Coast Conference quarterfinals.

Utah State 79, No. 10 Nevada 77 LAS CRUCES, N.M.

Chaz Spicer hit two free throws with 2.5 seconds left to lift the Aggies (23-10) past the Wolf Pack (28-4) in the Western Athletic Conference semifinals.

No. 9 Georgetown 84, No. 20 Notre Dame 82 NEW YORK

Jeff Green had a career-high 30 points to lead the Hoyas (25-6) against the Irish (24-7) in the Big East semifinals.

Southern California 70, No. 11 Washington State 61 LOS ANGELES

Gabe Pruitt scored 26 points, and the Trojans used accurate long-range shooting and success at the foul line to beat the Cougars in the semifinals of the Pac-10 tournament.

No. 13 Pittsburgh 65, No. 12 Louisville 59 NEW YORK

The Panthers (27-6) went on a 20-2 run to start the second half, beating the Cardinals (23-9) in the Big East semifinals.

No. 16 Oregon 81, California 63 LOS ANGELES

Taj Porter scored 24 points to spark the Ducks (25-7) against the Golden Bears (16-17) in the Pacific-10 semifinals.