Everton believe Chelsea are trying to pressure them into selling Ross Barkley by offering Romelu Lukaku plus cash for the player's services, according to The Sun.
Barkley has been outstanding for the Toffees this season and has become an integral member of Roberto Martinez's side.
The midfield ace has been linked with some of the elite clubs in the Premier League, with the likes of Manchester United and Manchester City having been credited with interest in the player in recent time.
The Red Devils have previously been linked with a £50m swoop for the England international, however it now appears that Manchester United manager David Moyes will have to battle Chelsea for the player's signature.
It remains to be seen as to whether Everton are willing to part ways with Barkley in order to bring Lukaku to the club on a permanent basis. The Belgian, who is currently on loan at the Toffees from Chelsea, has had a fine season at Goodison Park having struck 12 league goals in this campaign.
It appears unlikely that Everton will stump up the £25m asking price for Lukaku, therefore parting ways with Barkley may prove a viable option for Martinez.
The likes of Manchester United and Manchester City may well be keeping a close eye on potential negotiations between Chelsea and Everton over the coming months.