San Antonio won its third straight and improved its home record to a league-best 18-2. The Warriors have dropped three in a row and five out of six.
It was a tie game with seven minutes to go before the Spurs went on a 13-6 surge to end the contest.
Parker finished with 25 points and Duncan had 24 along with 10 rebounds. San Antonio went 18-of-20 from the foul line.
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