Chelsea will attempt to use second-choice left-back Filipe Luis in a deal to sign Atletico Madrid midfielder Koke this summer.
This is according to the London Evening Standard, who understand Atletico are keen to re-sign Luis, less than a year after selling him to Chelsea for a reported £15.8 million fee.
Luis, 29, has failed to cement his status as Chelsea's first-choice left-back due to the impressive form of Cesar Azpilicueta.
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It was reported earlier this year that the Brazil international told his former Atletico teammate Miranda that he wants to leave Stamford Bridge and this was followed up by reports claiming the reigning La Liga champions would love to bring the player back to the Vicente Calderon.
Koke, whose current contract contains a £48 million release clause, has been an instrumental player for Atletico over recent years and played a huge role in their extraordinary La Liga success last term.
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But it's no secret that Atletico have significant debts, despite offloading several key players last summer. The Daily Mail reported in October that Atleti are currently £84 million in the red, and there's a real chance Koke could be the next star to leave the Calderon.
But who would Koke replace in Chelsea's starting line-up? Let us know by leaving a comment in the box below!
Sami Khedira expected to reject Chelsea
One first-class midfielder who is not expected to join Chelsea this summer is Real Madrid's Sami Khedira.
The Germany international would prefer a move to the Bundesliga over the Premier League, according to Schalke chairman Clemens Tonnies.
Khedira looks set to leave the Bernabeu as a free agent at the end of the season, when his contract expires, and Schalke could be his preferred destination.
Chelsea fans: would you rather have Khedira or Koke in your midfield next season? Let us know by leaving a comment in the box below!
Gareth Bale urged to reject Chelsea
And finally, Real Madrid star Gareth Bale has been urged to reject reported interest from Manchester United and Chelsea in order to stay at the Bernabeu by Wales manager Chris Coleman.
"He should stay where he is," Coleman told the Daily Mail. "Chelsea are a huge club and have been successful as are Manchester United - but Real Madrid is Real Madrid.
"Gareth's good enough to win the big trophies, play on the big stage and play with the biggest club."
Bale has been under intense scrutiny in recent weeks, but has the ability to silence his critics over the coming weeks and months.
Chelsea fans: is Bale the player you need most? Have your say in the comments below!