Barcelona have so far missed out on top targets Philippe Coutinho and Ousmane Dembele, which has lead them to the Blues’ Brazilian international.
France Football have reported that the Spanish outfit have made the 29-year-old their reserve choice, should they fail to sign Brazil compatriot Coutinho.
Willian was linked with a move to Manchester United earlier this summer to reunite with former boss Jose Mourinho, but the move collapsed.
The Catalans are desperate to bolster their side following Neymar’s £198m mega-move to European rivals Paris Saint-Germain.
Hopeful Chelsea fans have picked up on this potential transfer, and clearly believe their midfielder is worth a little more than Barca will be willing to pay.
The 29-year-old has remained on the fringes of Chelsea manager Antonio Conte’s plans, but he has often added impact from the bench as an able replacement.
Willian started just 15 games in the Premier League last term, but scored eight goals as Chelsea stormed to the title in Conte’s first season in charge at Stamford Bridge.
Two games into this season, the Brazilian has played in both of Chelsea’s fixtures – he bagged an assist on the opening day of the season against Burnley.
The winger tallied eight goals and two assists in the last campaign, despite a lack of game time.
He signed a four-year contract with the London club in the summer 2016.
Willian joined the Blues in 2013 from Shakhtar Donetsk for a fee of £30million