The San Antonio Spurs defeated the Dallas Mavericks, 76-69, in the NBA 2K26 Summer League at Thomas & Mack Center on Saturday.

Cooper Flagg's summer league debut wasn't perfect. But there were flashes of greatness, and at this stage the Mavericks would be wise to let him fail.

Flagg scored 31 points and Harper poured in 16 as Harper's San Antonio Spurs claimed a 76-69 victory over Flagg's Dallas Mavericks in an NBA Summer League showdown in Las Vegas. Despite his team being on the losing end, Flagg put on a clinic.

Flagg scored 31 points in 31 minutes in Saturday's showdown with No. 2 overall pick Dylan Harper, as the Mavericks fell to the San Antonio Spurs, 76-69. His 31 points were the most by a No. 1 pick in the Las Vegas Summer League since John Wall in 2010,

Cooper Flagg led the Mavericks with a game-high 31 points, four rebounds and one assist, while David Jones-Garcia scored 18 points off the bench for the Spurs. Here are five observations from Saturday’s game:

This article was originally published on www.si.com as Cooper Flagg Thinks NBA Summer League Debut Was One of the Worst Games of His Life.

Thursday night’s matchup between Cooper Flagg and the Dallas Mavericks and Bronny James and the Los Angeles Lakers was the fourth-most-watched Summer League game ever, per ESPN.

The opening day of the NBA Las Vegas Summer League provided fireworks and the debut of No. 1 overall pick Cooper Flagg, who struggled to find his shot in a dramatic win over the L