Berbatov has been in fine form this season and Ferguson believes the Bulgarian has finally settled into life at Old Trafford.
Fergie said: "Not everyone has questioned Dimitar. He has a lot of admirers, particularly at this club.
"But when we buy a player for a lot of money, there is more focus on him.
"If they have an odd bad game there is a criticism which other players may not get.
"He worried about it himself but I told him he has to dismiss the press.
"Dimitar has had some terrific games for us. He is enjoying his football and he will play against Liverpool on Sunday."