The Spurs also used 17 points and nine assists from Tony Parker to improve to 9-0 on their home court.
DeJuan Blair helped San Antonio's cause with 14 points.
Phoenix, meanwhile, dropped its fourth straight despite Marcin Gortat's 24 points and 15 rebounds.
Steve Nash overcame a bruised right quadriceps to add 20 points and 10 assists for the losers.
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