Tatum scored 11 points in the fourth, and Robert Williams III blocked Georges Niang’s shot at the buzzer to give the Celtics a victory in their first game this season against their longtime Eastern Conference rivals and former coach Doc Rivers. 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 Schröder 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.