Ferguson goes head-to-head with the Italian for the first time in the league this Sunday when his United side travel to Stamford Bridge to take on the current leaders.
And with United trailing the Blues by two points in second place, Ferguson believes Ancelotti's men have already laid down a marker and that his side must get the upper-hand over them this weekend.
Them and us: Sir Alex Ferguson insists it's a two-horse race for the title this term with Chelsea being United's serious rivals for the Premier League crown
'It's looking that way,' Sir Alex told the club's official magazine Inside United. 'It seems they'll be the ones to get in front of.
Enlarge Red the full interview in this month's edition of Inside United - Manchester United's official magazine
'They have a very experienced team, that's the first thing. Their consistency, compared to last season, has probably been a wee bit better under Ancelotti.
'He's brought in the system he used at AC Milan of the diamond in the middle of the pitch. It's hard to break down when you get into their third, because they've got bodies compacted into the central area of the pitch.
'Jose Mourinho played one up and five in the middle of the park - that also made Chelsea very difficult to beat, but in a different way to what Ancelotti is doing.'
Mindful that United's record away from Old Trafford has betrayed them twice so far this season, Ferguson insists his team will not be looking to repeat any of the same mistakes they made in the defeat to Liverpool at Anfield almost a fortnight ago.
'You have to have a winning mentality and it was missing at Anfield,' he added.
Job well done: Sir Alex Ferguson (R) has praised Ancelotti's start to life in England
'We're in the business of winning, and when we lose it has an impact in that you can't afford to lose many if you want to win this league.
'It's always a hard game at Chelsea, but we'll deal with it better than we did at Anfield, I'm sure of that.'
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