Bolton's Spanish midfielder Ivan Campo has warned Barcelona that Manchester United will be a different proposition at Old Trafford next week.

"Old Trafford will be Barcelona players' worst enemy," Campo declared. "It will be very complicated for them to win on Manchester United's ground.

"It is not smaller than Camp Nou, but the fans are supporting in a very intense way that we are not used to experiencing in Spain.

"The truth is that I predict a dynamic display from United that Barca will have to block."