Jayson Tatum has a long road ahead after the Celtics superstar ruptured his Achilles, but a doctor is confident he'll be able to play at his superstar level when he returns.

A week ago, a Celtics dynasty was plausible. They were -900 favorites against the New York Knicks before their second-round series began. That number is +400 on Caesars after Tatum's injury news. Just by virtue of playing in the Eastern Conference,

Ahead of a must-win game for the Celtics, Globe sports columnist Chad Finn explains what’s gone wrong for the team.