TheQuadruple 08/09 season (Community Shield, Carling Cup, World Club Cup and Premiership)
Ferguson said before the season began he had expected Chelsea to be their biggest rivals, and despite the best efforts of some other contenders, he still feels the same way.
"At the start of the season I saw Chelsea as our biggest danger and I have not changed my mind," said Ferguson.
"Nobody has had a consistent run really."
Considering the injury list they have had to put up with this season - now added to by goalkeeper Edwin van der Sar being given indefinite compassionate leave for family reasons - United's performance is all the more impressive.
And their goal-scoring record - 40 in 19 Premier League games - is particularly eye-catching bearing in mind the loss of Cristiano Ronaldo to Real Madrid in the summer.
"People looked at us losing Ronaldo and saw that as being crucial," said Ferguson.
"They felt we wouldn't be nearly as good without him. Cristiano was an unbelievable player. But we have adjusted to it. There is only one point difference."
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