Marc Cucurella joins Chelsea on permanent deal from Brighton.
Chelsea pay £55m fixed fee plus £7m add-ons.
It is a record transfer fee for a left back in Europe.
The defender signs until June 2028, six year deal. Chelsea academy player, Levi Colwill joins Brighton on a simple loan as he is part of the deal.
Hopefully, Cuccurela is expected to fixture against Everton in the premier league opener.