Koulibaly was once racially abused during a Serie A clash between Napoli and Lazio in 2016 when the opposing fans booed him every time he touched the ball.
Koulibaly war rassistesch bei enger Serie A Konflikt tëscht Napoli a Lazio an 2016 geschitt, wou de Géigner vun de Géigner him all Kéier wann hien den Ball huet.