By Tom Finn

October 5, 2014

Arsenal manager Arsene Wenger has admitted he is afraid of Chelsea striker Diego Costa who he says is a “killer” before Arsenal travel to Stamford bridge this afternoon to take on league leaders Chelsea.

Summer signing Costa who Blues boss Jose Mourinho signed from Atletico Madrid for £32 million has scored eight times in his first six Premier League games.

“Costa has the aspects that you like. He is focused, always determined and ready for a fight,” Wenger said.

“He has done fantastically well and he is a very efficient player.

“The timing of his runs and his determination, his killing determination – you feel he is a killer, he has that in him when in front of goal.”

The Arsenal boss remains confident however that the Gunners can cause an upset despite Chelsea not having lost a game with 16 points from a possible 18.

“You have to find a balance between nullifying their strengths, but without forgetting to express your strengths,” said Wenger, despite not having been able to beat Chelsea in their last 11 matches.

“It is very important that we concentrate on having a great determination, a great desire and a great hunger and to focus on the way we want to play.”

Chelsea manager Jose Mourinho is expecting a tougher match this time unlike their last meeting at the Bridge in which Chelsea won 6-0 and says he is relishing the contest.

“They will always be a difficult opponent but I like it difficult,” he said.

“I like to play against the best and my players also like it.

“Sometimes we are worried about the focus and we are worried about the approach. But when you play big matches you know the players are more than ready for that.”

It will also be an emotional day for Chelsea new boy Cesc Fabregas, who played for Arsenal from 2003 to 2011 and made 303 appearances for the club.

“I think he loves Chelsea already,” Mourinho said. “He’s so happy: the way he plays, the way he’s a member of the squad, the way he lives in this little blue village.

“He doesn’t forget Arsenal and he’ll never lose his respect and his connection with the club but if you ask him now if he regrets his move here, I’m sure he’d say no.”