Celtics star Jayson Tatum appeared to suffer a serious ankle/leg injury during Boston's Game 4 loss to the Knicks on Monday.

The Boston Celtics lost another big lead against the New York Knicks. Then, in the final minutes, they may have lost their best player for an indefinite amount of time.

Tatum went down in the fourth quarter after planting his foot awkwardly. He was in visible pain as trainers rushed to his side and was later taken to the locker room in a wheelchair. The Celtics have not released a diagnosis on Tatum, who will undergo an MRI on Tuesday.