DeSean Jackson has revealed that the Philadelphia Eagles have kept some of their plays hidden during their pre-season games.

The NFC East side have a new head coach for their 2013 campaign, having replaced Andy Reid with Chip Kelly at the end of last season.

The wide receiver told the team's website: "In the past, teams have done a great job of seeing what I've done early in my career with making the big plays and electrifying plays and things like that, but now with this offense coming in, it's really going to be a plus in my eyes.

"A lot of teams don't really know what to expect. Regardless of what we did in the pre-season, I still think there are a lot of plays that have been hidden and that we haven't been running. [Chip Kelly's] versatility with the offense [will] keep the defense off-guard.

"Regardless of where I come out every play with the tempo and with the speed plays and intensity and things like that, we'll always be able to keep them off-guard."

The Eagles begin their season against the Washington Redskins on Monday.