Jamaree Bouyea/s game-winner provides the singular highlight of the opening slate at NBA 2K26 Summer League in Las Vegas. With the warmup action out of the way, the crown jewel of NBA summer action got underway Thursday in Las Vegas with the opening day of the 2025 NBA 2K26 Summer League.

Cooper Flagg scored 10 points and led the Dallas Mavericks to a victory in his first NBA Summer League action.

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.