Cooper Flagg made his NBA Summer League debut Thursday night and although he and the Dallas Mavericks earned the win, the No. 1 NBA Draft pick called it “one of the worst game of my life.”

LAS VEGAS (AP) — Cooper Flagg strolled into UNLV’s Thomas and Mack Center at 4:17 p.m. on Thursday, wearing Dallas Mavericks gear, bright white New Balance shoes, and an emotionless look on his face as he passed through security.

The No. 1 overall draft pick faces off against Bronny James and the Lakers in Summer League with broadcast available on ESPN and multiple streaming platforms.