BOSTON — The Celtics made playoff history in Game 1 on Monday night while blowing a 20-point third quarter lead to the underdog Knicks. The hosts shot just 25 percent from the field from 3-point range in the 108-105 overtime defeat, going just 15-of-60 from beyond the arc.

Freed from the shackles of the Orlando Magic’s oppressive defense, the Celtics let it rain from 3-point range in Game 1 of their second-round series. They launched 60 threes against the New York Knicks,

A sloppier, rushed, and less-connected version of the Celtics took the floor at TD Garden, and New York did not hesitate to capitalize on it.