After spending last season with Leeds United, Baker is now ready to move to Germany for a fresh loan arrangement.
BILD says Baker is set to move to Fortuna Dusseldorf and has already left London to join their preseason training camp.
Fortuna chief Luzu Pfannenstiel is now in advanced talks to close the deal with Chelsea.
Baker will move to the Germans for a 12-month loan without an option to buy.
The midfielder, 24, spent last season with Leeds and also Championship rivals Reading.