Jalen Brunson scored 39 points as the New York Knicks beat the Boston Celtics 121-113 to leave the reigning NBA champions on the brink of elimination from the play-offs.

The Knicks stormed back from 14 points down in the third quarter to go 3-1 up in the best-of-seven Eastern Conference semi-final and are in sight of the finals for the first time since 2000.

The Celtics also lost forward Jayson Tatum, who scored 42 points before being carried off in the fourth quarter with what coach Joe Mazzulla described as a “lower body injury”.

The six-time All Star, who was later seen being taken to the Madison Square Garden locker room in a wheelchair, will have a scan on Tuesday to assess the damage.