Hill got a close look at Flagg's competitive edge last summer when USA Basketball invited the then-high school phenom to practice with the Select Team ahead of the Paris Olympics. As managing director of the program, Hill watched Flagg hold his own against NBA players -- a rare opportunity for a teenager.

The No. 1 draft pick is expected to take the court for Dallas against the Lakers tonight at 8 p.m. ET, with tickets available through multiple platforms.