My fear is that the Celtics have such a low margin for error, having p---ed away games 1 and 4. The Sixers are formidable and even if the Celtics do play well (and up to their own standards) - it could still come down to a few possessions and a loss.
They can win this game tonight, predicated on their defense leading to good offensive possessions. But it's going to be a war this evening.