The 31-12 months-antique Senegal captain turns into the second signing after Manchester City striker Raheem Sterling for the reason that Todd Boehly's consortium bought the membership. "I'm very happy to be right here with this crew at Chelsea," said Koulibaly.
"It's a massive group inside the global and my dream changed into constantly to play within the Premier League. Chelsea got here first to get me in 2016 however we failed to make it. Now after they got here to me I commonplace it due to the fact they honestly wanted me to come back to the Premier League to play for them.
"When I spoke to my correct friends Edou (Mendy) and Jorginho they made my desire less complicated." Koulibaly, who led Senegal to the African Cup of Nations identify in advance this 12 months, joined Napoli from Genk in 2014 and made 317 appearances for the Italian aspect. He won the Italian Cup title in 2020.
His arrival at Stamford Bridge follows the departures of defenders Antonio Rudiger to Real Madrid and Andreas Christensen to Barcelona, both on unfastened transfers. "Koulibaly is a herbal chief and a sturdy character," Chelsea said in a statement.
"He has masses of experience challenging for domestic and global titles and joins the Blues ahead of the 2022/23 marketing campaign aiming to do just that."