John Beilein’s real NBA coaching debut comes in October.

He probably knows a little bit more about what to expect now.

Cleveland’s new coach got his first bit of practice for the real thing on Monday in the NBA’s first game of the summer — only to have San Antonio spoil his debut. Lonnie Walker IV scored 20 points, and the Spurs beat the Cavaliers 97-89 in the Salt Lake City Summer League opener.

Afterward, Beilein said there’s still some things he had to learn about the NBA game. He thought there was going to be a jump ball to begin the second quarter, only to learn the NBA doesn’t have those.