Garnett was suspended one game for elbowing the Heat's Quentin Richardson. Richardson was fined $25,000 for his own part in the scuffle.
Dwayne Wade scored 29 poitns in a game in which Boston was able to almost entirely supress the Miami offense, limiting them to 32% shooting.
MIchael Beasley and Jermaine O'Neal were unable to support Wade. Beasley had early foul trouble while O'Neal shot 1-10 from the field.
Ray Allen scored 25 poitns for the celtics including seven threes. Glenn Davis, who filled in for Garnet, did not buckle under the pressure and scored 23 points of his own.
Paul Pierce had 13 points and Rajon Rondo had 8 points, 12 assists, and seven rebounds.
The Celtics also dominated MIami on rebounds 50 to 33.
The Heat will go back to Miami for Game 3 to try and even out the series at home.