Willian has decided to give Chelsea first refusal on his next contract.
With his current deal to expire in June, the midfielder is in contact with Barcelona - well aware they wish to take him on a Bosman deal next summer.
Mundo Deportivo says Willian is delighted with Barca's interest and eager to discuss pre-contract terms over the New Year.
However, the Brazil international has also let it be known that his first choice is to stay with Chelsea and he will wait until they make their contract offer before considering a move to the Nou Camp.
Much will hinge on Chelsea breaking their contract policy of handing players over 30 rolling year-to-year deals - something Willians has no interest in.