According to Underdog NBA, both teams have announced their starting lineups for the game.
The Celtics are the Eastern Conference's second seed, having defeated the Brooklyn Nets and Milwaukee Bucks in the first two rounds.
They swept the Nets and then defeated the Bucks in a Game 7 in Massachusetts on Sunday afternoon.
In the first two rounds, the Heat defeated the Atlanta Hawks and Philadelphia 76ers, respectively.
They won five games against the Atlanta Hawks and six games against the Philadelphia 76ers.
They have been off for the last four days since the finish of their series with the 76ers on Thursday night.
In the 2020 Eastern Conference Finals, the two teams met, and the Heat won the series.
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