Flag scored 23 of his game-high 28 points in the second half to power the Blue Devils past the Wolfpack 74-64 to improve to 18-2 and 10-0 in ACC play. Duke outscored NC State by 14 in the second half thanks largely to the play of Flagg and fellow freshman phenom Kon Knueppel, who added 19 points of his own.

CHESTNUT HILL, Mass. — First came the look you rarely see from Cooper Flagg. A mixture of frustration, incredulity and bemusement, the result of being called for a technical foul late in the second half of the Duke men’s basketball team’s game at Boston College on Saturday night.