Top-ranked Duke now faces serious injury questions that threaten to linger well beyond however long the Blue Devils play this week in Charlotte.

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.

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.