Duke coach Jon Scheyer says point guard Caleb Foster will try to play in Friday night’s Sweet 16 matchup against St. John’s. Foster broke his right foot in Duke’s regular-season finale and missed the first two rounds of the NCAA Tournament for the top-seeded Blue Devils. He was on the court Thursday during the portion of practice open to reporters, but that largely consisted of stretching and a bit of shooting. It was hard to tell how mobile Foster might be. Foster is averaging 8.5 points per game this season. He’s made 30 starts.