The Celtics fell apart in the second half of a 115-107 loss in Denver. Jamal Murray erupted for 48 points to lead the 9-1 Nuggets.
Boston got 31 points from Kyrie Irving, but for the second consecutive game, Irving alone wasn't enough against another burgeoning star guard.
The Celtics shot just 12 foul shots, to 28 for Denver, as an 18-point first-quarter lead disappeared.
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