North Carolina's head coach Roy Williams,right, gestures to College of Charleston's head coach Bobby Cremins before the start of an NCAA college basketball game in Charleston, S.C. on Monday, Jan. 4, 2010. (AP Photo/Mic Smith ...

ARLINGTON, TX - DECEMBER 19: Head coach Roy Williams of the North Carolina Tar Heels coaches from the sidelines against the Texas Longhorns at Cowboys Stadium on December 19, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

North Carolina coach Roy Williams argues with an official during the half of an NCAA college basketball game against Michigan State in Chapel Hill, N.C., Tuesday, Dec. 1, 2009. (AP Photo/Gerry Broome)

North Carolina coach Roy Williams speaks with an official during the first half of an NCAA college basketball game against Nevada in Chapel Hill, N.C., Sunday, Nov. 29, 2009. (AP Photo/Gerry Broome)