Arsenal loanee Yaya Sanogo has "no qualities" to offer to Ajax, according to youth academy assistant coach Ronald de Boer.

Sanogo signed for the Eredivisie side on a season-long loan deal in July and scored a hat-trick in his first start for the club on Monday as they beat Qatari side Umm Salal 6-1 in a behind-closed-doors friendly.Yet De Boer, whose twin brother, Frank, is in charge of Ajax's senior team, expressed his doubts over the France Under-21s international's value to the club."I heard Frank say last