The newly-promoted Premier League club have confirmed that the 34-year-old has signed a two-year deal at the Riverside.

Valdes will be looking to revive his career after a frustrating spell at Manchester United saw the Champions League winner starved of regular first team football.

"You can't imagine how delighted I am because it's not usual to bring players like him to recently promoted teams," said head coach Aitor Karanka. "He knows how strong this group is. It's a privilege for us to be able to bring a player like this to the club." Valdes becomes Middlesbrough's fifth signing this summer, after Viktor Fischer, Bernardo Espinosa, Marten de Roon and defender Jordan McGhee.