NEW YORK— After the Celtics finished practice at Baruch College here on Friday, Isaiah Thomas, Marcus Smart, Jae Crowder and Gerald Green played a spirited one-on-one game called “King of the Court,” and it got predictably feisty.

The rules of the game are simple: The offensive player gets three dribbles to score on the defensive player. (At one point in the video, you’ll see Thomas argue that Crowder went over his limit.)

If the offensive player scores, the next defender steps in and tries to stop him. If he does not score, the defender goes on offense. The first player to score five points wins.

The Celtics foursome played three games, with Crowder, Thomas and Green winning once each.

“It’s a good game to try to stay in rhythm, stay in shape,” Green said. “It’s a good, competitive game.”

Late in the game, rookie Jaylen Brown asked to play. Smart said that was not allowed, but then Thomas pointed out that it was OK because Smart had not scored any points yet. Thomas then promptly blew by Brown for a layup, and it was pointed out that Thomas had let Brown play because he knew he would score on him.

Here is the video footage: