The left-back spent last season on loan with German side Schalke, making 21 appearances before suffering a season-ending cruciate ligament injury.
The Ghanaian full-back moved to the Bundesliga 12 months ago on what was supposed to be a season-long stint until a serious knee injury while playing at the African Nations Cup in January brought an early end to his tenure in Germany.
Schalke 04 sporting director Christian Heidel has confirmed that his outfit are locked in talks with English Premier League champions Chelsea about taking Baba Rahman on loan for a second successive season.
'We are in talks with the player, his advisor and Chelsea'.
'Ultimately, it is about when Baba will be able to play again. "No decision has been made yet".
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He has not played for Chelsea since May 2016 and since the Blues have picked up their pursuit on Juventus full-back Alex Sandro, it appears he is not part of manager Antonio Conte's first-team plans at Stamford Bridge.
"I do not know what will happen tomorrow, the day after or next week", Heidel added when quizzed about transfers.
He is under contract at Stamford Bridge until June 2020.
Rahman has made 23 appearances for Chelsea in all competitions since joining from Augsburg in 2015.