The diagnosis of a torn Achilles tendon for All-Star forward Jayson Tatum is a devastating blow to the defending champion Boston Celtics and the second injury of its kind during the NBA playoffs.

BOSTON (AP) — Boston Celtics star Jayson Tatum had surgery Tuesday to repair a ruptured right Achilles tendon that will sideline him for the remainder of the playoffs, the team announced.

Tatum on Tuesday "underwent successful surgery to repair a ruptured right Achilles tendon," the Celtics announced. He is out indefinitely, with the Celtics saying "no timetable is currently ...