Chelsea football chief Michael Emenalo is keeping tabs on Olympique Marseille defender Nicolas N'Koulou.

Emenalo is keen to strengthen Chelsea's long-term defensive options and L'Equipe says he is having Cameroon international N'Koulou scouted.

The 22 year-old is tied to l'OM to 2015 and the French giants are eager to open talks about a contract extension.