Kalidou Koulibaly was seen as one of the best defenders in the Serie A as he featured for Napoli for eight years.

Koulibaly has however struggled to make same impact at Chelsea following his summer move to Chelsea.

Legendary Italian manager Fabio Capello has claimed that Koulibaly so far lacks personality.

Ex-Chelsea defender Jason Cundy also admitted he has been worried about the defending of the Senegal international.

“Koulibaly still worries me, he worries me,” Cundy told talkSPORT after Chelsea beat AC Milan.

“On the ball he’s actually a really good, technical footballer. Out of possession, he dives in, he commits challenges, he’s too aggressive.

“There’s a part of his game that he needs to work on and understand he can’t win every single ball. He’s got to learn that.

“He gave two free-kicks away in the first two minutes [against AC Milan] and he could have been booked.

“I’ve yet to see the Koulibaly that everyone was talking about at Napoli and every team wanted for almost ten years. You feel like Napoli might have sold him at the right time.”