Boston Celtics star Jayson Tatum ruptured his right Achilles tendon in Monday night’s playoff game and will be out for an extended period of time.

The St. Louis native went down late in the game with a non-contact injury that had him writing on the ground in pain.

The Celtics’ offense is at its best when all five players are aggressively attacking the rim, spraying the ball out to open shooters and scrambling opposing defenses. It’s hard to do that when one player—Holiday in this case—removes himself from the action.