Dias signed a six-year contract, which keeps him at the Club until the summer of 2026.
Ruben Dias says he is happy to join Manchester City, adding that it is 'everything I could ever have wanted'.
While speaking to CityTV interview, the defender said he is convinced he will improve at the Etihad club.
He said: “City are a top club. To have the opportunity to join a club like Manchester City is a fantastic opportunity for me and one I couldn’t turn down.
“Their success speaks for itself. They have been the dominant team in England over the last few years, playing an attacking brand of football which I feel suits my own game.
“It is really exciting to be part of such a talented squad and to play for a world class manager like Pep Guardiola, who has a proven track record of developing young players like myself.
“I believe I can improve here, at a club whose ambitions match my own and I will give everything to be successful and win titles.”