Manchester United are going full steam ahead in the transfer window but as is tradition at the club, the heartbeat of the team remains its youth academy. Erik ten Hag has carried on that tradition with full respect and consistency, giving youngsters their debut and handling their progression expertly. The result has been headlined by the emergence of Kobbie Mainoo and Alejandro Garnacho, both players who have saved United millions in the market while valued at north of £100 million now themselves. United have identified the next one to follow in their footsteps and they are going all-in on tha…