4) Manchester United – Luke Shaw
When the 20-year-old signed for the Red Devils shortly after participating for England at last summer’s World Cup in Brazil, it appeared Shaw had the world at his feet and was destined to establish himself for club and country.
However, a series of injuries last season prevented the left-back from progressing even further and he now needs to steer clear of the treatment table this year if he is to fulfil his undoubted potential.