The Boston Celtics announced Tuesday that Jayson Tatum had successfully had surgery to repair his ruptured Achilles tendon. The Boston Star suffered the injury late in Game 4 of the semifinals against the New York Knicks.

Boston Celtics star Jayson Tatum had surgery to repair a ruptured right Achilles tendon, the team announced Tuesday. The Celtics did not provide a timetable for his return. Jayson Tatum today underwent successful surgery to repair a ruptured right Achilles tendon.

The Boston Celtics’ NBA title defense is hanging by a thread, but their biggest concern is the health of star forward Jayson Tatum, who had to be helped off the Madison Square Garden court after suffering an apparent noncontact leg injury during a 121-113 loss to the New York Knicks in Game 4 of the Eastern Conference semifinals Monday.