There are risks and rewards to betting big on youth. If any club is testament as to the benefits of such an approach, it is Manchester United. A club who’s success under Sir Alex Ferguson was built upon the foundations of those ‘Fergie’s Fledglings’, and who lifted the FA Cup last season thanks to goals from Carrington graduates Alejandro Garnacho and Kobbie Mainoo. But after spending £64 million on one inexperienced attacker last summer and seemingly readying themselves for to bring in another youngster for big-money 12 months on, are United going about their pursuit of a new centre-forward c…