Boston Celtics forward Jayson Tatum reacts as he heads to the bench after hititng a basket before a time out was called in the second half of an NBA basketball game against the Denver Nuggets in Denver.

Denver Nuggets guard Russell Westbrook reacts after turning over the ball in the second half of an NBA basketball game against the Boston Celtics in Denver.

Denver Nuggets forward Michael Porter Jr., right, shoots for a basket as Boston Celtics forward Jayson Tatum defends in the second half of an NBA basketball game in Denver.

Boston Celtics center Kristaps Porzingis, right, collects a loose ball as Denver Nuggets guard Russell Westbrook defends in the second half of an NBA basketball game in Denver.

Denver Nuggets forward Michael Porter Jr., right, dunks the ball for a basket over Boston Celtics center Kristaps Porzingis in the second half of an NBA basketball game in Denver.

Denver Nuggets guard Jamal Murray, left, drives past Boston Celtics center Al Horford in the second half of an NBA basketball game in Denver.

Denver Nuggets guard Russell Westbrook, center, drives to the basket past Boston Celtics guard Jaylen Brown, right, and center Al Horford in the second half of an NBA basketball game in Denver.

Denver Nuggets guard Jamal Murray, front drives to the basket as Boston Celtics forward Sam Hauser (30) and center Luke Kornet (40) defend in the second half of an NBA basketball game in Denver.

Boston Celtics center Kristaps Porzingis hangs from the rim after dunking the ball for a basket in the first half of an NBA basketball game against the Denver Nuggets in Denver.

Denver Nuggets guard Russell Westbrook, front, collects a rebound as Boston Celtics center Al Horford defends in the first half of an NBA basketball game in Denver.