Former Genk chief Dirk Degraen says Napoli defender Kalidou Koulibaly should be playing for a "bigger club".
Degraen was Racing Genk's sporting director when Koulibaly left the Belgian champions for Napoli.
The deal reached 10m with bonuses," he told Sky Sport Italia.
It was a deal that took off with De Laurentiis. He was earning 1,500 a month.
We met up yesterday and spent 45 minutes together for a drink. I think he's one of the best defenders in the world.
It's a shame that he hasn't made the step-up to a big European club yet. I think it'll be difficult for anyone to buy him from De Laurentiis."
