NAPLES, ITALY - AUGUST 01: Napoli's player Kalidou Koulibaly looks during the pre-season friendly match between SSC Napoli and OGC Nice at Stadio San Paolo on August 1, 2016 in Naples, Italy. (Photo by Francesco Pecoraro/Getty Images)
TURIN, ITALY - MAY 08: Afriyie Acquah (L) of Torino FC competes with Kalidou Koulibaly of SSC Napoli during the Serie A match between Torino FC and SSC Napoli at Stadio Olimpico di Torino on May 8, 2016 in Turin, Italy. (Photo by Valerio Pennicino/Getty Images)
People hold flyers depicting the face of Napoli's French defender Kalidou Koulibaly before the Italian Serie A football match SSC Napoli vs Carpi FC on February 7, 2016 at the San Paolo stadium in Naples, in solidarity with the player victim of racists slogans from Lazio's fans during the football match SS Lazio vs SSC Napoli on February 3. / AFP / CARLO HERMANN (Photo credit should read CARLO HERMANN/AFP/Getty Images)
Senegal's Kalidou Koulibaly (R) vies with Niger's Onouo Moussa Maazou (C) during the African Cup of Nations qualification match between Senegal and Niger, on March 26, 2016, in Dakar. Senegal won 2-0. / AFP / SEYLLOU (Photo credit should read SEYLLOU/AFP/Getty Images)
Kalidou Koulibaly during the Italian Serie A football match A.S. Roma vs S.S.C. Napoli at the Olympic Stadium in Rome, on april 25, 2016 (Photo by Silvia Lore/NurPhoto via Getty Images)
