Manchester United manager Sir Alex Ferguson believes Chelsea are the biggest threat to his team's Premier League title defence.
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Ferguson - Chelsea are our biggest threat
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Ferguson launches stinging attack on Benitez
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Sir Alex Ferguson accuses Stuart Pearce of breach of confidentiality
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Dunga warning for World Cup rivals
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Manchester United opens title defense with win;
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Ferguson praises Schalke's determination
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Ferguson warns that his players are up for it
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Alex Ferguson admits that Wayne Rooney wants out
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Sir Alex Ferguson: ``television is God at the moment''
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Manchester United boss Alex Ferguson bans players' Christmas party
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Ferguson will be making tough decisions in summer
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Ferguson rules out January signings
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United deliver early blow to rivals Chelsea
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Ferguson decides against return
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Chelsea must win, win, win:
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Everton FC will be dealt huge blow when David Moyes leaves says Sir Alex Ferguson
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Ferguson stokes the derby fires