Nantes have confirmed that Chelsea have completed the transfer of Papy Djilobodji.
The Ligue 1 outfit confirmed that the defender has signed a four-year deal with the reigning Premier League champions on their official website.
The Senegal international scored nine times for Nantes in 171 appearances in all competitions.
The French side wished their former player the best of luck in the future on their official website.
Chelsea manager Jose Mourinho is reportedly concerned with the state of his sides defending after conceding nine times in their first four league games.
Turkish Super League side Trabzonspor also made a £1.4 million bid for Djilobodji a source close to the Ligue 1 club told Turkish-football.com.
Trabzonspor recently signed Chelsea winger Marko Marin on a one-year loan with a €4 million buyout clause option. The Germany international made his debut against Akhisar on the weekend.
The Mirror report that Premier League outfit Sunderland are also interested in the 27-year-old defender.