"Michael Carrick was fantastic and he and Paul gave us composure in the match. In the really big games you need the composure and with Ryan Giggs using his experience as well, I thought those three were fantastic.
"With the workrate of Darren Fletcher as well, I thought the midfield was an important component of the team."
United failed in their opening major test against potential Premiership rivals when they were beaten at home to Arsenal last month and his pre-match rallying call was not to let it happen again.
"I said we couldn't afford to lose a big one again and the players responded to that with their performance. It was excellent," Sir Alex added.
"The belief is there that we can win the title. It is a growing belief. We started the season with the hope, desire and intention to do well this season and so far the players haven't let us down. There is a good appetite and a great confidence.
"I would not dismiss