Willian is demanding Chelsea extend their contract proposal if he's to re-sign.

Willian's contract at Stamford Bridge expires at the end of the season, however, and Barcelona are leading the race to land the Brazil international.

And ESPN reports the Chelsea star is yet to sign a new deal in west London because he wants a three-year deal.

At the current time, the Blues are only prepared to give the Samba star a two-year deal.

Unless Chelsea raise their offer, they face losing the club stalwart for nothing at the end of the campaign.

Barcelona could make a move and sign the Brazilian, with Quique Setien eyeing more attacking reinforcements.