Whoever finds himself in the Manchester United dugout next season – be it Erik ten Hag or another as-yet un-determined head coach – he will have to find an answer to the question on the lips of almost every Red Devils supporter. A question that, during the reigns of Jose Mourinho, Ole Gunnar Solskjaer, Ralf Rangnick and now Erik ten Hag, has plagued every one of the last four Manchester United coaches, at one point or another. How do you solve a problem like Marcus Rashford? How do you consistently harness the talents of a footballer who, at the age of 26, is still yet to outgrow the sort of i…
