Chelsea have accepted an offer of £67.1million from Barcelona for Willian, according to Sky Italia.
Willian will sign a five-year deal with the Nou Camp outfit worth €40million.
Barca have been desperate to land the Brazilian midfielder all summer and have seen three offers rejected by the Blues.
The La Liga giants’ first bid of £50m was followed up with another of around £53m.
They had a bid of £55m pushed back, before returning with a final offer that has reportedly now been accepted.