A stalwart in defence for Napoli, Kalidou Koulibaly will be expected to be equally as reliable for Senegal in Russia, writes Michelle Osei Bonsu.
The centre-back has been a rock for the Partenopei in Serie A this season and is a leader for his national team too.
Senegal are in a very balanced group with Poland - who they face this evening - Colombia and Japan.
That means K2 will be marking the likes of Robert Lewandowski, James Rodriguez, Radamel Falcao and his club teammate Arkadiusz Milik.
You can read the full profile of Kalidou Koulibaly here.
Or have a look through our 2018 World Cup Guide.