If you are looking to build your squad from scratch in Manager Mode, looking for decent young players of age 21 or below is never a bad option as they cost less and grow more. So, for your convenience, heres a list of the 10 Best Under-21 players in FIFA 14.
#10 Mateo Kovacic
He plays for Inter and is a versatile misfielder who can be used as a CM of a CAM. His asset is his potential and the moment you buy this player, he starts growing.