North Carolina coach Roy Williams discusses a call with an official during the first half of the team's NCAA college basketball game against Clemson on Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

North Carolina's Garrison Brooks reacts after scoring while defended by Clemson's Elijah Thomas (14) during the first half of an NCAA college basketball game Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

Clemson's Marcquise Reed drives to the basket for a layup during the first half of the team's NCAA college basketball game against North Carolina on Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

Clemson coach Brad Brownell discusses a call with an official during the first half of the team's NCAA college basketball game against North Carolina on Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

North Carolina's Garrison Brooks dunks while defended by Clemson's Elijah Thomas (14) and Hunter Tyson during the first half of an NCAA college basketball game Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

Clemson's Marcquise Reed works the baseline while defended by North Carolina's Kenny Williams during the first half of an NCAA college basketball game Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

Clemson's Elijah Thomas, right, shoots over North Carolina's Garrison Brooks during the first half of an NCAA college basketball game Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

North Carolina's Luke Maye, center, loses the ball between Clemson's Aamir Simms, left and Elijah Thomas during the first half of an NCAA college basketball game Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

North Carolina's Seventh Woods drives during the first half of the team's NCAA college basketball game against Clemson on Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

North Carolina's Luke Maye, left, dribbles down the baseline while defended by Clemson's Elijah Thomas during the first half of an NCAA college basketball game Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

North Carolina's Luke Maye (32) shoots while defended by Clemson's Javan White (35) and another player during the second half of an NCAA college basketball game Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

North Carolina's Kenny Williams drives to the basket during the second half of the team's NCAA college basketball game against Clemson on Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

North Carolina coach Roy Williams leaves the court before the team's NCAA college basketball game against Clemson on Saturday, March 2, 2019, in Clemson, S.C. Williams collapsed with seconds left in the first half and was helped off of the court. Williams fell near the bench during the first half of a game Saturday and was led to the locker room. (AP Photo/Richard Shiro)

North Carolina coach Roy Williams, right, speaks with Clemson coach Brad Brownell after an NCAA college basketball game Saturday, March 2, 2019, in Clemson, S.C. North Carolina won 81-79. (AP Photo/Richard Shiro)

North Carolina's Coby White (2) celebrates with Kenny Williams during the second half of the team's NCAA college basketball game against Clemson on Saturday, March 2, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)