Miami got off to a quick lead in the first quarter, powered by eight points from former Celtic Jae Crowder and seven from Goran Dragic. The Celtics kept it within five points after one thanks to 14 combined points from Tatum and Jaylen Brown.
Tyler Herro came off the bench for the Heat and scored 11 points in the second quarter alone, which helped the Heat extend their lead to 12 by halftime, 61-53. Dragic continued lighting up the scoreboard off the bench and finished with 20 points of his own.
Tatum got into foul trouble during the game, which limited his minutes. Marcus Smart fouled out in the third quarter and appeared furious with the officials. Smart was recently fined $15,000 for criticizing the officiating after a loss to the Bucks.
Three Heat players (Dragic, Bam Adebayo, Duncan Robinson) finished with over 20 points in the win. Adebayo also grabbed a game-high 12 rebounds.
Up Next: The Celtics have a back-to-back as they will try to get back to winning on Wednesday against the Brooklyn Nets.