Arsenal youngster Yassin Fortune has suffered an injury setback.
Jeorge Bird's Arsenal Youth website reports Fortune has been ruled out for two to three months through injury.
The France youth international, who joined the Gunners from Lens last year, suffered the problem after returning to pre-season training.
He will now miss the club's involvement in the Durban International Cup in South Africa, whilst he is also set to be absent for the start of the U18 campaign.