Ronald de Boer on Yaya Sanogo: He has 'no qualities' to offer Ajax

According to Ajax youth academy assistant coach Ronald de Boer, Yaya Sanogo is pretty useless.

Ronald's twin brother Frank manages the first team, and has previously backed the Frenchman to impress in Amsterdam since joining from Arsenal on loan.

A hat trick for Sanogo against Qatari side Umm Salal SC in a friendly, however, has not convinced sibling Ronald.

Goal.com reports that Ronald wrote in Voetbal International: "I heard Frank say last week that this is one of the best squads with whom he has ever worked.

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

Sanogo came on as a substitute during Ajax's 3-0 away win at AZ Alkmaar on Sunday, but struggled to make an impression in 30 minutes.

Ron told you so.