Carlos Tevez's first-half goal, sweeping home a scuffed Wayne Rooney shot, was enough to see Sir Alex Ferguson's side win and take three points.
And Ferdinand said: "Anfield is a hard place to come, they defend very well and there is pressure all over the park. Today we dealt with everything they threw at us and got the goal.
"They are a very good side. One moment of brilliance, Wazza's shot deflecting to Carlos - well it was a bit fortunate, but we'll take that.
"The whole team defended, closed them down, and everything they did get into the box we dealt with.
"I think you can tell from the reaction of the lads after, and the fans, it's a great feeling to come to Anfield and win."