Chelsea ace could move to Barca for free
The 31-year-old has been a strong performer for Frank Lampard's side this season and has been one of their key figures, yet he could depart next summer.
A move to Camp Nou for the South American has been mooted for several years.
The Chelsea veteran recently admitted that Barcelona approached Chelsea about acquiring his services after the 2017-18 season, but the London club rejected the LaLiga club's bid.
Lampard has compelled Chelsea to reward Willian with a contract extension following the Brazilian's impressive start to the season.