Chelsea manager Jose Mourinho has revealed he is worried by his side's away form in the Premier League.
Chelsea suffered a 2-0 defeat away at Newcastle United on Saturday with goals in the second-half coming from Frenchmen Yoan Gouffran and Loic Remy.
The Portuguese manager told the Club's official website: "At Newcastle we had the kind of match we have to analyse deeply because it was the worst.
"You have to know why you win, and you don't win by a miracle, you win by effort, you win by commitment, you win by ambition, you win by quality and you win by expressing yourself individually but in the team context.
"You have to know why you win and I tell my players every time I can, every time I have meetings with them, 'don't forget why you are getting results'.
"Against Everton (a one-nil defeat) we were really unlucky because we had a fantastic first-half and in the second-half we had a clear penalty for us and the referee didn't give it."
At Stamford Bridge, Chelsea's record under Mourinho is impeccable but just one victory away from home in the League is not good enough for the Special one.
"We can say that we played away in very difficult stadiums. We played at Man United, Tottenham, Newcastle and Everton, we played in probably the most difficult places to go, but I have to analyse it by another perspective which is the perspective of why we don't do better, and why especially on Saturday because that was the worst."
Chelsea are second in the table, five-points behind leaders Arsenal and will look to amend their disappointing away record with a win away to London-rivals West Ham United this Saturday.
First up though Chelsea entertain Schalke in the Champions League this week, in a game that they know they must win if they want to stay top of the group. They currently sit level with their German opponents and are ahead by goal difference, but an adverse scoreline could hinder their chances of qualification.
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