Man Utd turn to unsettled Valencia fullback Miguel
Miguel is under contract until 2012 and his buy-out clause is believed to be set at £12 million.
The Portugal international fell out with management earlier this season and admits: "I am ambitious and if a good proposition is made, anything is possible.
"The decision depends on Valencia.
"If the club accept my sale, no problems, and if the new (Valencia) coach relies on me, I stay."