Senegal defender Papy Djilobodji has signed a four-year deal with Chelsea, Nantes have announced.
The Premier League champions made their move for the 27-year-old after seeing their overtures for Everton's John Stones repeatedly rebuffed.
Chelsea have conceded nine goals in four games in accruing four points to sit eight adrift of leaders Manchester City.
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It's a far cry from last season where the Blues boasted the best defensive record in the division.
John Terry looks to be heading towards retirement, whilst Gary Cahill has lacked solidarity so far this term.