Chelsea boss Graham Potter admits going to West Ham today is a special game.
Chelsea travel across the capital city seeking a first away win since they defeated Salzburg in the Champions League at the back end of October.
Potter said, "It's not a statistic that we like, that's for sure,' said our head coach on the wait for an away win.
"Going away from home in the Premier League is not straightforward, everybody knows that, and there's the problems that we've been having in terms of injuries etc. But it's something we're trying to address.
"We have to start against West Ham. I've been there with Brighton and have a decent record there but it's a totally different context. It's a London derby, there is no love loss I think between the two teams in terms of how the atmosphere will be - which is great. It is a good atmosphere for us to test ourselves in.
"I think West Ham-Chelsea brings a different edge to it. The relationship between the two clubs, the fans etc. is totally different. But it was nice to win there and hopefully we can do it again.
"Whenever I watch West Ham I think historically they're always tough games. David Moyes's sides are really competitive. Everybody knows what they're doing. They've got some really good players.
"They attack big spaces well, defend in numbers and defend well, and are strong at set-pieces.
"So it's about understanding the environment, understanding the fact that it is a London derby, understanding that we have to match whatever intensity is coming at us with our own, and start the game well and try to take the three points."
