Granger ended with 27 points and grabbed seven rebounds for Indiana, which won for the third time in four games.
Paul George had 18 points and eight rebounds while Dahntay Jones and Leandro Barbosa added 12 points apiece for the Nets.
The Knicks, who led 59-51 at the half, couldn't hang on for the win despite a season-high 39 points from Carmelo Anthony, who also grabbed 10 rebounds.
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