Las Vegas' Thomas & Mack Center was buzzing on Thursday night, when No. 1 overall pick Cooper Flagg and the Dallas Mavericks took on Bronny James and the Los Angeles Lakers.

Bronny James made his feelings known on Cooper Flagg during the Summer League clash between the Mavericks and the Lakers.

Traditionally, the marquee game on the opening night of summer league features the No. 1 and No. 2 overall picks from the draft playing against each other, but not this year. The NBA scheduled a matchup with Flagg squaring off against the son of the league's all-time leading scorer, LeBron James.