Ferguson: We must maintain lead ahead of Chelsea clash

Alex Ferguson is demanding another Manchester United win at Sheffield United on Saturday to ensure his side retain a three-point lead over Chelsea going into their mouth-watering showdown the following weekend.

The Red Devils have record six straight Barclays Premiership wins since the disappointing draw at Reading in September, a run that has allowed them to sneak a lead on Chelsea, who have already twice stumbled unexpectedly this term.