4 – Kalidou Koulibaly
Chelsea have seen a £19.2million offer for Napoli defender Kalidou Koulibaly rejected this week, according to The Independent. Kouliably is one of the most talented young defenders in Europe and Chelsea, along with Arsenal are heavily interested in signing him. Napoli want to keep hold of the player but he is pushing for a move. An absolute monster in Napoli’s defence, combining composure on the ball with unmatched physicality that enables him to shut down most strikers, Koulibaly has managed 2.15 tackles won per 90 minutes last season which shows the dominant force he is. Koulibaly is a forward thinking defender and this is highlighted by his statistics of managing 62.86 forward passes per 90 minutes in the Serie A last season.