Chelsea boss Jose Mourinho has settled on Papy Djilobodji in his search for more options at the back, with the defender recruited from Nantes.
The Blues had made John Stones their priority signing during the off-season, but Everton stood firm and have thus far rejected three bids for the England international.
With the transfer deadline looming, the defending Premier League champions appear to have conceded defeat in their pursuit of Stones, subsequently confirming a deal for Senegal international Djilobodji on Tuesday.
The 26-year-old centre-back, who is also a capable central midfielder, has committed his future to the west London club for the next four seasons after steadily impressing for the Canaries since his move to Stade de la Beaujoire in 2009.
He was part of the Lions of Teranga squad that did duty at the 2015 Africa Cup of Nations in Equatorial Guinea, playing two of the three matches as their campaigned ended at the group stages.
Djilobodji told his new club's official website: "I'm very happy to sign for a big club like Chelsea and I want to do my best to help the team win titles. I want to thank the club for giving me this opportunity."