Tatum scored 26 points with a career-high 16 rebounds on Wednesday night, shaking off a slow start and a hard fourth-quarter fall to lead Boston to an 88-87 victory over the 76ers. Seth Curry scored 17 points and Shake Milton came off the bench to add 16.
Boston took an 88-84 lead with 38 seconds left when Dennis Schroder drove to the basket.
Freedom played 17 minutes, scoring four points and grabbing seven rebounds. The Celtics improved to 5-37 in the past nine seasons when scoring 88 or fewer points.