Marvin Bagley III had 13 points and 12 rebounds for the Blue Devils, who shot 55 percent and won despite tying a season high with 19 turnovers.
The sellout crowd included 37 NBA scouts, Miami Heat owner Micky Arison, Alex Rodriguez and Jennifer Lopez.
It also included Duke coach Mike Krzyzewski, back on the bench after missing Saturday's 89-71 victory over Wake Forest because of a virus.
Wendell Carter drove for a basket to tie it at 66, and Trevon Duval's driving layup on Duke's next possession put them ahead with 4:40 left.
The Blue Devils played their third consecutive game without injured center Marques Bolden (sprained knee) and forward Javin DeLaurier (hamstring).
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