Miami trailed by as many as 17 points in Game 2 but outscored Boston 37-17 in the third quarter and then hung on in the fourth.
Goran Dragic led the Heat with 25 points, while Bam Adebayo recorded a 21 point, 10 rebound double-double. Duncan Robinson was lights out from behind the arc, making six of 12 3-point attempts.
Kemba Walker led the Celtics with 23 points.
Former Arizona star Andre Iguodala played seven minutes off the bench without taking a field goal attempt and also had one assist.
Miami head coach Erik Spoelstra said Iguodala missed the second half because of a tight back.
Erik Spoelstra said Andre Iguodala wasn't able to play in the second half because of a "tight back."— Anthony Chiang (@Anthony_Chiang) September 18, 2020
Spoelstra went with a small rotation most of the night, as all five Heat starters plus sixth man Tyler Herro played 32 or more minutes. Kelly Olynyk was the only other Miami bench player with double digits in minutes.
Former Wildcat Solomon Hill has yet to appear in the playoffs.
What they’re saying about Arizona’s guys on social media
Heat-Celtics is a dead-even matchup. As much as I like the Celtics, I'll go with the Heat with this one because they have the talent and veterans that can get them over the hump. Speaking of veterans, Andre Iguodala is in his 6th straight conference finals.— ANA_WESTGOAT#0 (@susan1234456789) September 18, 2020