The agent of Napoli defender Kalidou Koulibaly feels his client still far from his peak.

Bruno Satin says the Senegal international can still improve.

“A player can always improve," Satin told Radio Kiss Kiss.

“Kalidou has already reached a good level, but he can get stronger in the air to become even more dominant in future."

On Napoli's form slump, he added: “There's no need to be dramatic, as a slight drop in form and an increase in fatigue can happen over the course of a season. Admittedly, the Europa League draw with RB Leipzig is by no means a simple one."