Chip Kelly has revealed that the Philadelphia Eagles' decision-making is affected by their opponent.

The NFC East side has shown a range of schemes during their first three games of the 2013 NFL season.

The head coach told reporters: "We always consider who we're playing and what we're doing when we're making our decisions. I think you're asking, 'Do you go for it on fourth down and some of those situations?' You always have to factor in the opponent.

"You also have to factor in your defense. There's a lot of things that go into it. I never look at it as a pure statistical thing. The statistics say 62% of the time you're going to convert, so you got to go with that number.

"I know [New England head coach Bill] Belichick had one a couple of years ago when he went for it on fourth down in his own territory because he didn't want to give the ball back to Peyton Manning."

The Eagles face Manning's Denver Broncos on Sunday.