Former Manchester City goalkeeper Willy Caballero has become Chelsea's first summer signing.
The 34-year-old takes over from Asmir Begovic who left the club to join Bournemouth.
Speaking after an agreement has been reached, technical director Michael Emenalo said: ""We are very happy to have Willy on board.
"He knows the Premier League and is tried and tested at the top of the game.
"We have three experienced goalkeepers and we look forward to welcoming him to the club when the squad returns to pre-season training."
Caballero started last season at Manchester City on the bench but featured more in the second half of the season.
Manager Pep Guardiola deployed the Argentine after regular goalkeeper Claudio Bravo failed to impress.