Kalidou Koulibaly was born on 20/06/1991 in Saint-Dié-des-Vosges, France. He began his professional club career with French team Metz in 2010, before moving to Belgian club Genk in 2012. He joined Italian team Napoli in 2014, where he immediately won the Supercoppa Italiana title. As Koulibaly was born in France to Senegalese parents, he was eligible to represent both nations at international level, and initially played for the France national under-20 football team. He later made his senior debut with Senegal in 2015. Koulibaly is recognised for his aerial prowess, anticipation, positioning, tackling, character, technique, and passing ability.