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.

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.

Before that colossal matchup between these college basketball blue bloods, the Tar Heels celebrated a big career achievement by North Carolina head coach Hubert Davis, who steered his team to a 68-59 quarterfinals victory on Thursday against the No. 4 seed Wake Forest Demon Deacons at Spectrum Center in Charlotte.