Per the Memphis Commercial Appeal:
Marcus Smart’s first mini-homecoming with the Boston Celtics won’t come on Sunday. The Memphis Grizzlies guard is expected to miss three to five weeks because of a left foot sprain, the team announced Friday.
Smart suffered the injury in the first quarter of the 134-107 loss to the Lakers on Tuesday in Los Angeles. He has played in all 11 games this season, but he also dealt with abdominal soreness in the preseason.