Manchester United striker Robin van Persie expects a cagey game Sunday against Chelsea.
The Dutchman has come under criticism for his lacklustre performances of late.
He said: "Chelsea have a very good team and we have a good team. But it's always a bit more edgy and I like that. You can sense that as well with the fans because they are a bit more on top of it in games like this. So in every way it's a game to look forward to.
"There's always a bit of a different feeling but it's not that we're less concentrated for other games but there's a bit extra tension in a good way. You don't really know what's going to happen before the game because it can go both ways."
