Ferguson was not too unhappy with the performance, even though, adopting his diamond midfield, United failed to penetrate their opponents and Wayne Rooney was a particular disappointment.
"We got a great start," said Ferguson.
"You hope to go on from a start like that and some of our football was very good but we never quite finished them off.
"We have played with the diamond quite a few times this season and done very well so I don't think that is an excuse.
"But we have got the three points and are still ahead in the league.
"With Chelsea drawing it draws us away from them a little bit further.
"But, of course, City are on our tails so it is going to be a long season."