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.

If North Carolina beats Duke, will it affect the Blue Devils' seed? And will the committee discount the win for the Tar Heels and keep them out of the t

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.