SAN ANTONIO — The San Antonio Spurs handled the Heat, and the heat, during a sweltering start to the NBA Finals. Tim Duncan had 21 points and 10 rebounds, and the Spurs beat Miami 110-95 on Thursday night in Game 1 inside a steamy AT&T Center. With an air conditioning failure making it feel like basketball in a sauna and causing LeBron James to battle cramps that knocked him out of the game's decisive stretch, the Spurs pulled away to win the opener of the first finals rematch since 1998.