Coming into the season, all of the talk concerning the Eagles centered around Chip Kelly's no-huddle offense. However, it has been the Broncos who have so far run the no-huddle better than anyone else.
If the Eagles are to come into Denver and pull off the upset, they will need a lot of things to go in their favor. But the Broncos must not get complacent.
Here is a look at four key matchups to watch in this game, which takes place at 4:25 p.m. ET on Sunday.