Portuguese goalkeeper Hilario says he has completed his move to Chelsea after undergoing a medical.
Hilario worked under Jose Mourinho at Porto
"I'm eager to start working with my new colleagues," said the 30-year-old Hilario after joining Chelsea on a two-year deal from Nacional.
He will become boss Jose Mourinho's third-choice goalkeeper behind Petr Cech and Italy's Carlo Cudicini.
Hilario added: "I have come here with two aims, to work hard and to make it difficult for Mourinho."
He added: "I want to complicate his life. There are many minutes in a season and I am going to work hard in order to earn the confidence of the coach."
I already worked with him and I know he is intelligent
"I respect and admire Cech and Cudicini, they are two great goalkeepers."
Hilario played under Mourinho at Porto in the 2003/04 season.
And Mourinho told Portuguese TV on Wednesday: "I already worked with him and I know he is intelligent.
"It's necessary to be intelligent in order be a substitute to the best goalkeeper in the world.
"He is not only bright but he also has common sense."