Manchester United winger Alejandro Garnacho is wanted by Paris Saint-Germain and Real Madrid amid claims his advisors have a plan for his future. Bringing through young players has been the hallmark of Manchester United over the years. From the class of ’92 to the success of Marcus Rashford, even the emergence of players like Tom Cleverley and Danny Welbeck as first-team regulars under Sir Alex Ferguson, United have generally been a fine home for youngsters. United have to make sure that young players coming through the ranks now believe that Old Trafford is the best place for their developmen…