They cruised to a 144-114 win over the Philadelphia 76ers on Sunday on the back of 56.8 per cent three-point shooting to complete a four-game series sweep.
Miles McBride led the way with 25 points on 7-of-9 from long range, and star guard Jalen Brunson scored 22 on 6-of-10 three-point shooting.
The Knicks’ 18 made threes in the first half tied for the most in any regular-season or post-season half in NBA history.
New York also scored 81 points over the first two quarters, second-most in franchise history. The Knicks scored their first-half high of 83 only 10 days ago in the first round against the Atlanta Hawks.
The Knicks were eliminated by the Indiana Pacers in six games in last season’s East final.
They’ll play the winner of the Cleveland Cavaliers-Detroit Pistons second-round series this time around, where the Pistons currently lead 2-1.