Additionally, the fact that the possibility of Callum Hudson-Odoi departing from the Bridge can not be ruled out only adds to Chelsea's hesitancy in letting Willian join Barcelona.
Barcelona could look to sell playmaker Philippe Coutinho just 12 months after his record-breaking move from Liverpool as they bid to bring Neymar back to the Nou Camp.
Willian saw a proposed move to the Nou Camp fall through previous year while Malcom was a £38m buy from Bordeaux. Reports suggested Barca had made a swap deal for Willian, an offer consisting of £49 million plus his compatriot. Barcelona then went ahead with Malcom.
FDA inspections have stopped, thanks to government shutdown
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Chelsea have scored the least goals (36) out of the top six and it's Willian's contribution that's most concerning.
While Sarri has been very open about the fact he has little say over transfers at Stamford Bridge, the Italian coach is expected to at least let his club hierarchy know what positions he feels his side need strengthening in.
31 year old Willian has only 18 months to run on his current deal with no suggestion yet that he will extend his contract. The cash could have also been utilized to sign another player as well.
Defensively Chelsea haven't been too bad in the Premier League - they've only conceded 16 goals in 21 games - but going forward they've struggled somewhat.