Chelsea have been monitoring the situation of Lyon centre back Mouctar Diakhaby.
The 20-year-old 6ft 4ins defender has already attracted scouts from Manchester City and Juventus this season after impressing in Ligue 1 and during Lyon's Europa League campaign.
The France U21 international only broke into Lyon's first team last year and is gaining a reputation as a composed defender who is also a threat from set-pieces.
Diakhaby has featured four times for Lyon in Ligue 1 this season, as well as playing the full 90 minutes twice as the French side beat Everton both times in the Europa League group stage.