Bayer Leverkusen attacker Andre Schurrle has reportedly grown concerned that his proposed transfer to Chelsea may not materialise.
The German international is believed to have agreed terms on a five-year contract at Stamford Bridge following talks between the Premier League club and his agent.
However, the Blues have still been unable to agree a fee with Leverkusen, who want Kevin de Bruyne as well as £20m for their player, according to the London Evening Standard.
Chelsea are thought to only want to loan out De Bruyne, though, after he impressed during a stint in the Bundesliga with Werder Bremen this season.
As a result, 22-year-old Schurrle is said to have started to doubt that a move will now happen.