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DURHAM, N.C. (AP) _ Duke reserve Matt Christensen apologized to a referee for blocking him from leaving the court and yelling at him following the Blue Devils' loss to Indiana in the NCAA tournament.

The NCAA asked Christensen to write a formal letter of apology to referee Bruce Benedict for his actions following the March 19 game. Duke coach Mike Krzyzewski pulled Christensen away from Benedict.

Duke sports information director Jon Jackson said Christensen had complied with the NCAA's request. The NCAA has not yet issued an official statement that the matter is closed.

Christensen, a senior, did not play in the Blue Devils' 74-73 loss to Indiana in a Southeast Regional game.