Ferdinand is under contract at Old Trafford until 2013 but The Sun claims United could be tempted to cash in on the 30-year-old.
A source revealed to The Sun: “Rio can see the sense of it.
“Not only would it be a fresh challenge as he nears the end of his career, it would also fit all his projects off the pitch.
“Rio has big business plans, which are already taking shape, and would really take off if he moved to one of the big Spanish clubs.”
