Rudiger is still heading towards being a free agent at Chelsea as he is yet to sign a new contract with the West London club.
The Germany international has an extension offer on the table but deems it unsatisfactory.
The 28-year-old remains in a position where he can discuss pre-contract terms with any team outside England.
Meanwhile, Manchester United are plotting a swoop for Lazio midfielder, Sergej Milinkovic-Savic, Calciomercato reports.
Man United are in pole position to sign Milinkovic-Savic ahead of Juventus and Paris Saint-Germain who have also been linked with the player.
Milinkovic-Savic has previously been valued at £60 million but that fee will likely be higher following his fall out with Lazio manager, Maurizio Sarri.