French youngster Coquelin joins Arsenal
Coquelin has joined the club from French third division side Laval.
The 17 year old impressed during a trial with Arsenal last season and had been expected to sign during the last two months.
He passed a medical back in May but his signing was only officially announced by the Gunners on Friday.
"The 17-year-old has joined from SASP Stade Lavallois Mayeene MFC."