RALEIGH, N.C. — There has been plenty of waiting this week for Duke, the No. 1 seed in the NCAA Tournament’s East Region.Much of that pertains to the status of freshman forward Cooper Flagg, who has missed the Blue Devils’ last 2 1/2 games after suffering an ankle injury during the Atlantic Coast Conference tournament.Then Duke (31-3) had to wait to learn who its first-round opponent would be. Turns out the Blue Devils will face No. 16 seed Mount St. Mary’s on Friday afternoon at Raleigh, N.C.The Mountaineers (23-12) defeated American 83-72 in the First Four on Wednesday night in Dayton, Ohio.Duke carries an 11-game winning streak and holds a No. 1 regional seed for the 15th time.”Just really grateful for this opportunity and we can’t wait to get started,” Blue Devils coach Jon Scheyer said.The buzz around Duke has been strong all season, particularly because of Flagg. He suffered a sprained ankle in the first half of the ACC quarterfinal matchup with Georgia Tech on March 13, watching from the bench as Duke went on to defeat North Carolina and Louisville to win the tournament.Scheyer repeated the Blue Devils will take a cautious approach to bringing Flagg back to action, though he was optimistic that his young star can be on the court when the NCAA Tournament begins.”I want to get Coop back as quick as we can,” Scheyer said. “Our goal is for Friday, no question about it.”Flagg leads Duke in scoring (18.9 points per game), rebounding (7.5), assists (4.1), steals (1.5) and blocks (1.2).There are plenty of other key contributors for the Blue Devils. Freshman Kon Knueppel, the Most Valuable Player of the ACC tourney, provides 14.4 points and 4.0 rebounds per game. Guard Tyrese Proctor will be in his third NCAA Tournament with the team.