Ferdinand has 18 months left on his current contract with the Red Devils.
United boss Sir Alex Ferguson recently confirmed that Ferdinand was no longer first choice at Old Trafford.
Ferdinand is reportedly realising that he could quickly fall behind Jonny Evans, Chris Smalling and Phil Jones in the pecking order at Old Trafford.
Ferdinand will be 35-years-old when his current deal with United expires.
The England defender has recently been linked with the likes of MLS side Chicago Fire, Qatari side’s Lekhwiya and Al Sadd.
