The Celtics are on the verge of falling behind 3-1 in the series. (The Knicks lead 113-104 with three minutes remaining), but the Celtics also could be losing their star player. Jayson Tatum went down with a lower right leg injury. He was helped off the court and is Boston's locker room.

Led by Jalen Brunson's 39 points, the New York Knicks took down the Boston Celtics by the final score of 121-113 in Game 4 of their second-round playoff series on Monday night.

Losing Game 4 against the New York Knicks was a big blow, but Jayson Tatum's scary injury only makes matters worse for the Boston Celtics.