Manchester United manager Sir Alex Ferguson admits he had made an error in putting Nemanja Vidic on the bench for the Carling Cup final and handing Rio Ferdinand a start instead.

"The only mistake I made on Sunday was with Vidic," said Ferguson.

"I didn't realise he had played three games in the competition.

"But I needed Ferdinand back into rhythm because he missed too many games from December onwards.

"Having got that really good game under his belt we hope Ferdinand and Vidic will be a really solid partnership to the end of the season."