Enzo Fernandez is excited to finally make his move to Chelsea.
The Argentina midfielder's €120m switch from Benfica was formally announced by Chelsea on Wednesday afternoon.
Fernandez said, "I am grateful to Chelsea and its ownership for doing everything they could to make me a part of this project. I'm happy and excited to join the Pride of London, to play in the best league in the world and to compete for the biggest trophies.
"I can't wait to play in front of our fans and help my teammates on and off the pitch."
Todd Boehly, Chelsea chairman, and Behdad Eghbali, co-controlling owner, said: "In Enzo we are signing a World Cup-winner and one of the brightest talents in global football. We are excited to add him to Graham's squad and we are sure he will form an important part of our team going forward.
"Enzo has demonstrated his ability at the very highest levels so we're looking forward to seeing what he will do in Chelsea blue!"
Chelsea have confirmed Fernandez will wear the No5 shirt.