Cooper Flagg is going to be the No. 1 pick in the 2025 NBA draft. When he starts playing in Dallas who knows what teams will present themselves as rivals through his career, but a new feature in Sports Illustrated reveals the story behind his earliest rivalries in his driveway with his twin brother, Ace, and his mother, Kelly.
Cooper grew up playing Ace, who is a minute older and will play at the University of Maine this upcoming season, but mom was the most formidable opponent at home when he was young.
