This article was originally published on www.si.com as Cooper Flagg Thinks NBA Summer League Debut Was One of the Worst Games of His Life.

Cooper Flagg was faced with a challenge the first day on the job by head coach Jason Kidd. In his first game, he proved he was up for the challenge.

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.

Cooper Flagg is one of the most well-rounded prospects to enter the NBA in recent memory. His competitve drive started pea picking in Maine.