7 most valuable defenders in the world right now

#4 Kalidou Koulibaly - €60 million

Kalidou Koulibaly of Napoli in action during the Serie A

Kalidou Koulibaly has shot to fame of late, courtesy of his sensational performances in the last season for Napoli.

Other than the Senegalese, many other Napoli players have also caught the eye of high-profile clubs in view of The Blues' stellar Serie A campaign where they fell just short of beating Juventus to their seventh consecutive Scudetto title.

One of the most sought-after defenders in the ongoing transfer market, the 27-year-old is a versatile, Swiss Army knife of a defender who has earned plaudits for his tactical intellect, anticipation, aerial prowess and passing ability, which had allowed him to excel at Maurizio Sarri's possession-based system.

Although Senegal failed to qualify for the knockout stages in the World Cup, Koulibaly still impressed the spectators with his undeniable talent and was one of the best performers for The Lions of Teranga.