Manchester United have relied heavily on the youth this season as is tradition for the club, but Erik ten Hag has been told to change. The Manchester United academy has long been among the world’s best and has produced some of the club’s greatest players. The likes of Paul Scholes, David Beckham and George Best all graced the academy doors for United through the past. This trend has continued in the present day with some of the best in recent years also coming out of Carrington with Marcus Rashford, Paul Pogba, Scott McTominay, Alejandro Garnacho and Kobbie Mainoo all being graduates. This pas…