Boston Celtics point man Marcus Smart took a premature exit on the team’s 121-116 Saturday victory over the San Antonio Spurs due to a left knee contusion

With less than eight minutes left in the third period, Smart tried to fight Zach Collins’ hard-moving screen, which the reigning Defensive Player of the Year fell to the ground due to the hard collision. Collins was assessed with an offensive foul, while Smart was assisted in getting up and was hobbling in pain.

As he went to the locker room, Smart was eventually announced unavailable to return – finishing with five points, four assists, and two rebounds in 22 minutes against the Spurs.

Per Boston Globe’s Gary Washburn, Smart’s x-rays came back negative.

“Yeah I’m walking,” Smart said. “But it’s a slow walk.”

Stepping up to fill the void left by Smart, Malcolm Brogdon was huge coming off the bench, registering 23 points, seven assists, and two boards. Jayson Tatum led the way for the Cs with his 34 markers and four boards.

Boston now climbs to 28-12 as they will head back home from a lengthy road trip to face the Chicago Bulls the following Monday.