Manchester United boss Sir Alex Ferguson believes Dimitar Berbatov is now showing his best form.

Berbatov is yet to win over a section of the United support since his club record £30.75million arrival from Tottenham 18 months ago.

But his efficiency is starting to pay dividends and, having eased him through a knee injury Ferguson is now confident will not require an operation, the Bulgarian will be a key figure in the challenges that lie ahead.

"Dimitar has had a bit of a knee niggle but it is a lot better now," said Ferguson.

"We have been treating him quite carefully because we know that we need him in the important second part of the season.

"He came through a full game against Hull and felt fine. He doesn't need an operation and hopefully that is it gone now."