Ajax Youth Academy coach Ronald de Boer has sensationally claimed he sees no useful qualities in Arsenal loanee Yaya Sanogo.

De Boer's brother and Ajax first team manager Frank de Boer has publicly stated he believes Sanogo has the potential to excel in the Eredivisie, but it appears Ronald does not share the same view.

"I heard Frank say last week that this is one of the best squads with whom he has ever worked," Ronald de Boer told Voetbal International.

"However, when I see Sanogo, I still have my doubts. I have still found no qualities with which you can do something.

"I think that Ajax has too little depth, the real speed is lacking, meaning that your opponent can never be surprised. An opponent of Ajax can therefore cope quite easily under pressure and that makes the team relatively easy to defend against."