Antonio Rudiger reportedly feels disrespected by Chelsea's contract offer and is now preparing to leave the Blues on a free transfer at the end of the 2021-22 campaign.
The Germany international's deal at Stamford Bridge is due to expire next June, and there remains widespread speculation surrounding his future.
Manchester United, Paris Saint-Germain and Real Madrid are said to be among the clubs interested in signing the 28-year-old on a free transfer upon the expiration of his contract.
Chelsea are still working to sign the defender to a fresh agreement, but according to Football Insider, the German is now preparing to leave the London club.
The report claims that Rudiger has been offered less than Mason Mount - who has allegedly been presented with a fresh £140,000-a-week package - which has left him feeling disrespected by the European Cup holders.
Real Madrid are believed to be in the driving seat for the centre-back, who would allegedly choose to move to the Spanish giants over any other club.