Chelsea have reportedly decided that they will only sell Willian this summer for a fee of £70.8m.
Willian has spent the last five years at Stamford Bridge, with 44 goals being scored in 236 appearances, but the playmaker has just two years remaining on his contract.
In recent weeks, Manchester United have again been linked with an approach for the Brazil international, while it has also been claimed that Barcelona have failed with an offer of £50m.
According to Mundo Deportivo, that has resulted in Chelsea setting an asking price of €80m for the 29-year-old, whose value will decrease if no new deal is penned with the West Londoners.
Willian is currently representing his country at the World Cup, leaving it unlikely that any potential deal will progress until the conclusion of the tournament.