The St. Louis native went down late in the game with a non-contact injury that had him writing on the ground in pain.

The Celtics blew a 14-point lead, then lost their best player to injury in a Game 4 loss to the Knicks that pushed Boston to the brink of elimination.

On the other side of the court, Jayson Tatum put together a strong performance before going down with a serious lower leg injury. Many believe that Tatum tore his Achilles after scoring 42 points on 16-for-28 shooting to go along with eight rebounds, four assists, four steals, and two blocks.

The Boston Celtics lost Game 4 and saw Jayson Tatum suffer a potentially serious injury on Monday night against the New York Knicks. The Knicks won 121-113 thanks to a strong second half and erased another large deficit,

NBA playoffs picks, predictions, odds, TV channel, how to watch, stream Boston Celtics vs New York Knicks NBA playoff game on Wednesday, May 14.

Tatum had a non-contact leg injury and had to be helped off the court, it looked serious and changes everything for Boston.

Down by 14 points in the third quarter of Game 4, the Knicks came roaring back for another improbable, instant-classic victory over the defending champion Boston Celtics.

Tatum suffered an apparent leg injury late in Game 4 of the Eastern Conference semifinals, and he is set for further evaluation Tuesday with Boston one loss from elimination.

Boston Celtics forward Jayson Tatum left Monday's Game 3 against the New York Knicks in the fourth quarter with what appeared to be a foot or ankle injury. He was assisted off the court by trainers and taken through the Madison Square Garden tables in a wheelchair.

The Boston Celtics and New York Knicks will meet for a Game 4 Eastern Conference semifinals matchup tonight in New York City.

Over the first two games of the second-round series between the Boston Celtics and New York Knicks, there were major concerns regarding the defending champions.