Bronny James and Cooper Flagg's Summer League showdown drew a crowd that resembled a real NBA game ... with plenty of notable faces in the stands for the contest, including Kyrie Irving!!
The matchup between the Lakers and Mavericks went down Thursday night at the Thomas & Mack Center in Las Vegas, Nevada ... where LeBron's son and the 2025 No. 1 overall draft pick went at it.
Irving -- who tore his ACL during a game in March -- was posted up courtside to support his new rookie teammate, who finished with 10 points in his debut after going 5-21 from the field.