Cooper Flagg didn't shy away from self-criticism after a rocky NBA summer league debut, calling the performance "not up to my standard" following the Dallas Mavericks' 87-85 win over the Los Angeles Lakers.

Cooper Flagg was faced with a challenge the first day on the job by head coach Jason Kidd. In his first game, he proved he was up for the challenge.

No. 1 overall pick Cooper Flagg didn't shoot the ball well, but he was able to impact winning in a big way for the Dallas Mavericks in their Summer League opener. The performance didn't come without some jitters that Flagg says he has gotten through after his debut.