Manchester United are building the best young squad in all of football, here’s an XI of all the club’s biggest wonderkids. While the club are looking to bolster the squad with some signings to make an impact, the nature of Manchester United is to use Carrington. We’ve seen this through the usage of both Alejandro Garnacho and Kobbie Mainoo last season and there looks likely to be at least one academy wonderkid who makes the step up this coming season. The number of quality talents at the club is almost too many to count, so here is a quick guide to the best under-21 talents at the club right n…