Manchester United boss, Ole Gunnar Solsjkaer sent his scout Jim Lawlor to Napoli to watch the centre-back in Napoli ahead of plans to complete a world record £90million summer move. Lawlor was reportedly impressed with Koulibaly as he featured in last Saturday's 0-0 draw at Fiorentina in the Serie A, as well as featuring in Napoli's 3-1 win over Zurich in the Europa League five days later.
Other clubs have also showed interest in the Senegalese player, who admits he is flattered.