Chelsea are eyeing Sporting CP defender Ousmane Diomande for the January market.

Diomande came close to joining Arsenal over the summer, but is now a target for the Blues, says The Sun.

The young centre-half's contract holds a £70m buyout clause.

Chelsea have identified the Ivory Coast international as a potential successor to Thiago Silva. The veteran's deal expires in June.

Also interested in Diomande is Newcastle.