Thiago Silva comes over from Paris Saint-Germain, where he did not want to renew his contract. He played for eight years for the Parisian top club.
The transition to Chelsea has been in the air for quite some time. Thursday the central defender was judged in Milan, a day later Chelsea presented the acquisition.
Chelsea strengthened earlier with Hakim Ziyech, Timo Werner, Ben Chilwell and Malang Sarr. Dutch youth international Xavier Mbuyamba also joined the London club. He played in the youth of Barcelona. Chelsea also hopes to welcome Leverkusen star Kai Havertz for the new season.