Houston guard Jamal Shead is questionable to return to Friday's Sweet 16 contest against Duke after suffering a right ankle injury, the team announced at halftime.
According to Joseph Duarte of the Houston Chronicle, X-rays were negative and Shead has been diagnosed with a severely sprained ankle.
Shead slipped on a layup and fell at 6:38 of the first half.
He appeared to be in pain and had to be helped to the locker room.
Shead had two points on 1-for-5 shooting, with three assists and one rebound, prior to exiting the game.