Northwestern's Tre Demps (14) tries to block the shot of Purdue's Anthony Johnson (1) during the first half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston, Ill. (AP Photo/Jim Prisching)

Northwestern's Dave Sobolewski (3) defends as Purdue's Ronnie Johnson (3) drives to the basket during the first half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston, Ill. (AP Photo/Jim Prisching)

Northwestern 's Alex Olah defends as Purdue's Terone Johnson dribbles to the basket during the first half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston, Ill. (AP Photo/Jim Prisching)

Purdue's D.J. Byrd (21) shoots a three-point basket over Northwestern's Dave Sobolewski (3) during the first half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston, Ill. (AP Photo/Jim Prisching)

Purdue's Ronnie Johnson (3) drives to the basket around Northwestern's Alex Marcotullio (4) during the first half of an NCAA college basketball game Saturday, Feb. 2, 2013,in Evanston, Ill. (AP Photo/Jim Prisching)

Northwestern's Reggie Hearn (11) celebrates a basket against Purdue during the second half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston, Ill. Northwestern defeated Purdue 75-60. (AP Photo/Jim Prisching)

Northwestern's Reggie Hearn (11) shoots a three-point basket against Purdue during the second half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston, Ill. Northwestern won 75-60. (AP Photo/Jim Prisching)

Northwestern's Tre Demps, center, splits the defense of Purdue's Rapheal Davis, left, and Anthony Johnson (1) during the second half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston, Ill. (AP Photo/Jim Prisching)

Purdue's Rapheal Davis (35) and Terone Johnson (0) battle for the rebound against Northwestern 's Alex Olah (22) during the second half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston, Ill. Northwestern defeated Purdue 75-60. (AP Photo/Jim Prisching)

Purdue head coach Matt Painter yells out to his team as the play Northwestern during the first half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston, Ill. (AP Photo/Jim Prisching)

Northwestern head coach Bill Carmody shouts out to his team as they play Purdue during the first half of an NCAA college basketball game Saturday, Feb. 2, 2013, in Evanston,Il. (AP Photo/Jim Prisching)