While all the attention on this season's title contest has centred around United and Arsenal, Sir Alex Ferguson believes Chelsea are serious challengers and should not be underestimated.
Avram Grant's side are six points behind the Reds and nine adrift of league leaders Arsenal. But they have a game in hand and are poised to pounce should the league's two pace-setters slip.
"The number of points Chelsea are behind Arsenal is not insurmountable," Sir Alex told the League Managers' Association website. "The fact that they have got us and Arsenal at home, and their home record is so good, you would have to think they have still got a big chance in the Premier League."
Chelsea are unbeaten at home this season, but they have dropped points at Stamford Bridge - far more than their rivals, too. Arsenal have surrendered four points at the Emirates Stadium this term, while United have missed out on five points at Old Trafford. But Chelsea have drawn five on their patch, losing out on a surprising ten points.