Frenzy became bedlam on the next play. Flagg talked trash to James, ran to his spot on the left wing, pivoted off the catch and nailed the shot before turning to exult with his future Mavericks varsity teammates, who cheered him on decked out in casual wear from their courtside seats.

Cooper Flagg Gets Honest On Disappointing Summer League Debut originally appeared on Athlon Sports. Duke star Cooper Flagg finally made his NBA debut, helping the Dallas Mavericks take down the Los Angeles Lakers 87-85 in their first game of the Las Vegas Summer League.

Dallas Mavericks rookie Cooper Flagg described his NBA Summer League debut as "one of the worst games of my life," but drew praise from coaches and opposing guard Bronny James after a win over the Los Angeles Lakers.