The La Liga giants have been relentlessly pursuing Courtois this summer, with the Belgian goalkeeper keen to return to the Spanish capital and Chelsea resigned to losing him.
Julen Lopetegui is keen to build his side around Gareth Bale following Cristiano Ronaldo's exit and views Willian as the ideal foil to the Welshman, who will be given a free role. As always, until it's actually an officially done deal, take the rumors with a grain of salt.
-Eden Hazard is of course the hottest current Chelsea summer transfer window related topic and it appears we're heading towards closure on this narrative.
Though parting with Willian may not be Maurizio Sarri's intention, if it means that we keep hold of Hazard, it may well be worth it.
According to the Daily Mail, Chelsea want to raise the stakes even further and demand he become the first £200 million player in history.
Davy Klaassen leaves Everton after one year to join Werder Bremen
He told Werder Bremen's official website : "With him, we brought our absolute favourite player to the Weser". He said the strength of Werder's desire to sign him made the club an obvious choice of destination.
Who could that be now?
Everton are likely to resist any approach for the man they signed for £30m from Sunderland last summer, with the 24-year-old one of England's standout players as they progressed to the World Cup semi-finals.
Alisson was Chelsea's initial top target to replace Courtois but he went on to join Everton's rivals Liverpool in a £65m ($87m) deal from Roma.