Manchester United boss Sir Alex Ferguson says they go to Real Madrid full of confidence with Robin van Persie in attack.

On Sunday Van Persie took his goals tally for the season to 23 against Everton.

"Robin is now approaching that level," said Ferguson of comparisons with Barcelona's Lionel Messi and Cristiano Ronaldo, who will line up for Madrid against his former club on Wednesday.

"He has been a breath of fresh air."