Chelsea manager Jose Mourinho says his side are not leading contenders to win any trophies this season because they lack a cutting edge in front of goal.
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The Blues beat Crystal Palace 2-1 to move two points behind Premier League leaders Arsenal ahead of their meeting at Emirates Stadium on 23 December.
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"I don't think we are the big contenders of any competition," Mourinho told BBC Radio 5 live.
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"We don't have the striker who is going to score 30 goals in the league."
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Only five of Chelsea's 32 league goals this season have been scored by recognised strikers: Fernando Torres (two), Samuel Eto'o (two) and Demba Ba (one).
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"We know we don't have that striker we used to call the killer, the selfish one, the one that gives the last touch," said Mourinho.
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"You don't kill and when you don't kill you are giving a chance to the opponent. It happened to us against Everton, it happened to us against Stoke.
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You have situations to kill and you don't, so it's difficult.
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"It is a concern. We have to try to improve our defensive mistakes but I think the defensive mistakes are also a consequence of the fact you don't kill.
Jose Mourinho is very right that is why i'm still shocked as to why he bought a certain Samuel Eto'o.
Let's see if the strickers they already have will do the damage against Arsenal today.