The 26 year-old has not seen much playing time during this season with the Cameroon international making just 2 starts from a possible 8 matches.
AC Milan are in the hunt for the former Arsenal man with suggestions pointing towards a bid of around 10 million euros to be made in January.
The Milanese side have strengthened in the midfield department with Andrea Poli, Kaka and Ricardo Saponara joining but they still only have Nigel De Jong as the sole out and out holding midfielder at the club.
Manchester United are also interested with the Red Devils taking a different approach to Song with a possible loan move instead of a permanent one.