The main on-court event on the NBA summer calendar begins Thursday when the Las Vegas Summer League tips off from Sin City. There are seven games on Thursday's slate, including a matchup between Cooper Flagg's Dallas Mavericks and Bronny James' Los Angeles Lakers.

Star rookie Cooper Flagg isn't the only first overall pick in his respective draft to join the Dallas Mavericks NBA Summer League roster.

Cooper Flagg used the practice court on the far left side of his new basketball home to work on his 3-point shooting following his first summer league practice with the Dallas Mavericks. Josh Broghamer,