The Celtics won their fifth straight and for the first time in almost a month have climbed two games above the .500 mark. Their high water mark thus far this season came when they had a 12-9 record on Dec. 12.
Boston had a 16-point lead midway through the third quarter, but Houston cut it to one with 7:22 to play. The Celtics then ended the game on a 20-9 run.
Houston was led by James Harden with 24 points. He had scored at least 25 in 14 consecutive games.
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