Willian is hopeful fellow Brazilian David Luiz stays at Chelsea beyond the end of the season when his current contract is due to expire.
Centre-back Luiz has regained his place in the Chelsea starting XI this term under Maurizio Sarri, having only made 10 Premier League appearances for Antonio Conte last season.
The former Paris Saint-Germain defender is into the final six months of his contract, meaning he is able to begin discussing end-of-season moves to other clubs.
Willian, however, is optimistic they will all come to an agreement in the end.
When asked if he wants Luiz to stay, Willian said: “For sure, of course. I want [him to stay].
“We have to see if they, the club, will want him. I think they want him. For me, I want him to stay.”