Cooper Flagg made his NBA Summer League debut Thursday night and although he and the Dallas Mavericks earned the win, the No. 1 NBA Draft pick called it “one of the worst game of my life.”

The Dallas Mavericks had their first Summer League game on Thursday night, meaning Cooper Flagg had his first official NBA moment in a Mavs uniform. He didn't have the greatest game scoring the ball, having 10 points on a shockingly poor 5/21 shooting, but he impacted the game in other ways with his playmaking, defense, and transition game.

Rookie Cooper Flagg may not have been happy with his professional debut Thursday night in the NBA Summer League, but he still drew rave reviews all around after the Dallas Mavericks defeated the Los Angeles Lakers,