Clemson basketball picked up perhaps its biggest win of the season, defeating North Carolina to avenge another loss in the ACC Tournament.

UNC trailed by as many as 18 in the second half before cutting its deficit to a single point in the final seconds.

CHARLOTTE, N.C. (AP) — Nick Davidson scored 17 points, and Clemson nearly allowed an 18-point second-half lead to slip away before holding on to beat No. 19 North Carolina 80-79 on Thursday night in the Atlantic Coast Conference Tournament quarterfinals.

The Tar Heels' loss on Thursday night could have major ramifications for its positioning in the NCAA tournament.

Clemson and No. 19 North Carolina meet in the ACC quarterfinals on Thursday, just nine days after the Tar Heels defeated the Tigers, 67-63. Tigers bettors were beaten by the hook on the 3.5-point spread,

The Clemson Tigers and North Carolina Tar Heels meet Thursday in the ACC Tournament. Tip off in Charlotte, North Carolina, is set for 9:30 p.m. ET.

The top-ranked Duke Blue Devils enter the ACC Basketball Championships chat as they make their first appearance Thursday night in a quarterfinal against No. 8 seed Florida State.