Duke freshman Cooper Flagg appeared to injure his left ankle after slipping under the basket and was helped to the locker room by two teammates late in the first half. He did not return.

There was a development in the ACC Tournament on Thursday that could have ramifications at both ends of the bracket. Duke All-American freshman Cooper Flagg suffered a sprained ankle in the first half of the Blue Devils' win over Georgia Tech in the ACC quarterfinals.

The first ACC Tournament semifinal features one of the most storied rivalries in college sports as the Duke Blue Devils (29-3, 20-1) take on the Tar Heels of North Carolina (22-12, 15-7). Storylines abound but the largest is Cooper Flagg's availability.