Manchester City has signed Eliaquim Mangala from Porto for approximately £32 million.
Mangala was Manuel Pellegrini's prime summer target to improve City's central defense.
Pellegrini hopes Mangala, 23, will play alongside the captain, Vincent Kompany, with Martín Demichelis and Matija Nastasic providing competition.
Mangala said: “City is a top club in Europe. For me, it was an important step to leave Porto and join Manchester City in order to continue my progress. I want to win titles and I believe I can do this. I am ambitious and this is why I am here.
“I’m very happy to come to England because for me, the Premier League is the best league in the world. It is a very intense and very aggressive competition. There are plenty of goals, so it is also really nice to watch and I can’t wait to get started.”