The bottom line is that this team is gassed. They're running on empty and have been this whole series. It's not an excuse, because it's partly their own fault, but it is reality.
Give this team a day off prior to this series, or at least a decent night's sleep, and they win game 1. Give 'em an extra day off sometime during the series, and they win game 4. This is a damn good team, and championship worthy, but they don't have anything left in the tank. That's the breaks, you gotta play the schedule before you.
If they can win this game, it'd be all heart. I don't know if they're physically capable of willing themselves to a W, but if they do, how can you not respect the heck outta that?