North Carolina head coach Roy Williams collapsed on the sideline at Littlejohn Coliseum on Saturday in the Tar Heels' game against Clemson.
The team tweeted that Williams suffered a vertigo attack and his return to the second half of the game is unknown.
Williams fell to one knee in front of the Tar Heels' bench with less than one minute left on the clock before halftime. Play was stopped and Williams was immediately attended to by players, assistants and the medical staff. Two people helped Williams to the locker room, and he waved to the crowd as he left the court.