Ahead of the Boston Celtics' second-round series against the New York Knicks, all Joe Mazzulla wanted to talk about was the margins. The Celtics were heavily favored and had beaten the Knicks four times in the regular season, but their coach stressed that none of their advantages matter if they don't take care of the details.

The Knicks came from 20 points down to force overtime and beat the Celtics, who had a terrible night from 3-point land, in Game 1 of their series.

The New York Knicks defied the odds Monday at TD Garden, coming back from a 20-point deficit and outlasting the Boston Celtics 108-105 in overtime of Game 1 of the Eastern Conference semifinals. The Knicks went on a 25-9 second-half run to cut the Celtics’ lead to four points with roughly 9 minutes left to play.