Boston star Jayson Tatum sustained a right foot or ankle injury on a noncontact play late in the Celtics’ Game 4 loss to the host New York Knicks on Monday night.

Tatum was hurt when teammate Jaylen Brown fumbled the ball and Tatum made an attempt toward it. OG Anunoby finished the play with a dunk to give New York a nine-point lead en route to a 121-113 win in the Eastern Conference semifinal contest.

Tatum was in agony on the court and called his own timeout before grabbing at his ankle with 2:58 remaining. He was helped off the floor with his right foot kept above the ground and was later seen being pushed to the locker room on a wheelchair.

Tatum had racked up 42 points, eight rebounds, four assists, four steals and two blocks before the injury. He knocked down seven 3-pointers.