Flagg is warming up to the thought of the Mavs, and a further Duke reunion could make life in the Big D more comfortable

Cooper Flagg said people told him he'd never play Division I basketball because of where he's from, but he's proven those doubters wrong.

A resurfaced video shows a 13-year-old Flagg running basketball drills while wearing a Mavericks t-shirt. Despite barely being a teenager, Flagg is shown running back and forth across the baseline to defend a corner three-point shot. As he travels back toward the basketball, Flagg is passed the ball, which he dunks repeatedly.