Chelsea assistant manager Ray Wilkins has questioned Manchester City's ability to be taken seriously as title challengers. City are second in the Premier League just four points behind champions Chelsea after beating them 1-0 at Eastlands last month.
He told the Independent: "It will always be Manchester United, it will always be Arsenal.
"They will always be there or thereabouts. Yes, City, as fabulous a group of footballers as they have, have got to gel as a unit.
"They are getting results and good luck to them as well, but it's never easy when you are just pulling guys together and hoping that it will come together.
"It's very tough and Roberto (Mancini) is doing a good job for them as well."
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