Al Horford stepped up for Boston in Game 5, and now the real test begins for the Celtics, who will likely be without their starting center for the conference semifinals.
Luka Doncic has 35 points and 10 assists to lead the Mavericks to a Game 3 victory on Wednesday night, putting the Clippers down 3-2 in best-of-seven series.
Luka Dončić singlehandedly outscored Paul George, James Harden and Russell Westbrook.
The Celtics doubled up the Heat in the first quarter, 32-16, and led by as many as 37.