As great as Belichick is, it still comes down to individuals executing. Making catches... finding gaps... finding open receivers... covering open receivers... not making senseless penalties that kill the momentum of a scoring drive.
Brady's shown the propensity to throw some errant passes over the last few years under pressure. Not that he has to be perfect. Nor Foles on that same token.
The key to winning this football game (for the Eagles) is putting Brady on his ass. And if they can get to him, then I think it'll be a highly contested affair. If they can't - it'll be a long day and one in which probably doesn't sit well with me or my Eagles brethren.
Tom Brady is the greatest QB I ever saw play during my lifetime. But that doesn't mean he's invulnerable to having an off day. And the more pressure the Birds can put on him - the better the odds of him having an off day.