Boston Celtics forward Jayson Tatum suffered a significant injury late in the fourth quarter of Game 4 against the New York Knicks, casting a shadow over Monday night’s 121-113 loss. While chasing a loose ball, Tatum collapsed to the floor in clear pain, grabbing his right ankle in what appeared to be a non-contact injury. He was unable to walk and had to be taken off the court in a wheelchair at Madison Square Garden.