Their player of the year will join Chelsea for a total fee of more than £60m.
They will also bring Blues defender Levi Colwill on loan.
Final details of the negotiations are expected to be completed this morning.
The official announcement will finally end what has become a transfer saga.
https://www.theargus.co.uk/sport/20602713.chelsea-brighton-complete-cucurella-colwill-deals/?ref=rss Chelsea and Brighton strike deals with Cucurella and Colwill