Arsenal cult hero Emmanuel Frimpong says they should move for Napoli defender Kalidou Koulibaly.

Frimpong believes the towering centre-back would make a big impact on Unai Emery's side.

“I watched the game against Watford and it wasn't good. Our defence is certainly weaker, when you compare it to Liverpool or Manchester City," Frimpong told Meta Ratings.

“David Luiz has been making some mistakes, and in my opinion, there's little difference between Luiz and Mustafi; I would rather see Callum Chambers selected.

“They need to be buying better defenders, like Koulibaly, who can make a big impact on Arsenal's team."