Manchester United defender Nemanja Vidic says the team needs to up the ante this weekend against Liverpool.

Vidic admits the Red Devils were 'casual' in their performance midweek against Inter Milan in the Champions League and will require a much-improved to overcome a confident Liverpool outfit.

"We need to forget Inter now," said Vidic.

"Liverpool is the next big game we must play, and they are in good form, full of confidence. They had a great win against Madrid (4-0 on Tuesday).

"But we're at home in front of our crowd, and I think, I hope we are going to be much better than we were against Inter.

"We will definitely try to improve, to erase the mistakes we made and play better against Liverpool."