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 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.
The Columbus Crew went to Mexico and flattened Monterrey to reach the CONCACAF Champions Cup final.