The Brazilian has failed to settle in London and a return to Spain is looking increasingly likely.
The Brazilian full-back is seemingly a prime target for the Spanish side as they look to improve their squad, having already completed the signing of Jackson Martinez to bolster the attack.
They are now reportedly looking to secure a deal for their former star, who joined the Blues last summer but has failed to settle in England as Cesar Azpilicueta has been preferred ahead of him.
It is believed Chelsea are more than happy to sanction his return, and that Jose Mourinho would not oppose the move, but both will only allow it to happen once they have secured a suitable replacement, so as to avoid weakening the squad ahead of the new season, claims AS.
No cheap sale
It is unlikely though, that Mourinho will allow the player to leave cheaply, especially given his recent history of selling players at a big profit.
The likes of Juan Mata, Andre Schurrle, Kevin De Bruyne and Romelu Lukaku have all departed Stamford Bridge in recent seasons but at big profit for the club, as they manage Financial Fair Play superbly.
Any sale of Luis is likely to follow a similar trend, a matter which could complicate a return to Spain, as Simeone’s side would surely be unwilling to pay over the £14 million they sold him for a year ago.