If the Celtics extend their season by beating the visiting New York Knicks in Game 5 of the Eastern Conference semifinals Wednesday night, they will do so without leading scorer Jayson Tatum.

The Boston Celtics star was ruled out for the rest of the playoffs with a torn right Achilles tendon, the team announced. Tatum underwent surgery on Tuesday, less than 24 hours after he initially sustained the injury. A timeline for his return is not yet known, but he is expected to make a full recovery.

Not only did the Boston Celtics lose to the New York Knicks Monday to fall to within one game of elimination from the playoffs, they also lost Jayson Tatum to a torn Achilles, the team announced Tuesday.