The reigning NBA champions posted their biggest winning margin of the season to bounce back from a last-gasp defeat to the Boston Celtics at the weekend.
The team's coach told reporters: "It wasn't perfect. There were still some areas we definitely need to improve on, in terms of the details and discipline.
"At least the effort, the effort, the activity was better, the disposition right from the beginning and it carried through once we got into the rotation. Guys were much more focused and bringing that competitive spirit."
The result leaves Miami with a 5-3 record.