Arsenal boss Unai Emery has named his 25-man squad for the forthcoming Europa League campaign, but at first glance the list is missing three key players and there is a very good reason why.
Ainsley Maitland-Niles, Eddie Nketiah and 18-year-old Emile Smith-Rowe are all excluded from the list, as they can be placed on the club's B list because they fall under certain UEFA requirements.
As quoted by Football London, UEFA rules state: "A player may be registered on List B if he is born on, or after, 1 January 1997 and has been eligible to play for the club concerned for any uninterrupted period of two years since his 15th birthday (players aged 16 may be submitted if they have been registered with the club for the previous two years).