Tim Duncan had 21 points and 10 rebounds, and the Spurs beat the Heat 110-95 on Thursday night in Game 1 at steamy AT&T Center.
With an air-conditioning failure making it feel like a sauna and causing LeBron James to battle cramps that knocked him out of the decisive stretch, the Spurs pulled away to win the opener of the first Finals rematch since 1998.
Manu Ginobili had 16 points and 11 assists, Tony Parker added 19 points and eight assists, and the Spurs shot 59 percent.
James finished with 25 points but played only 33 minutes, and Miami was outscored 36-17 in the fourth quarter.