Paul Pogba might never play a competitive football game again. The four-year ban for doping, unless he successfully revokes it – an unlikely outcome – would spell doom for a career that could be slotted straightaway into the textbook of cautionary lessons. It’s tragic that a career seemingly destined for the stratosphere could wither away in anonymity, even more tragic when the tragedy is largely self-scripted. The French midfielder’s career had all the narrative arcs to weave a rags-to riches-and-glory story. The deprived upbringing in a rough quarter of Paris for immigrants; the jaw-dropping skills that crammed Le Havre Academy with scouts; exit and return to Manchester United for a then-record British transfer fee; a World Cup winner at 25, with the author of a stunning goal in the final; multiple-time league winner with Juventus, touted as the heir to Zinedine Zidane; the future bright and sparkling, a potential Ballon d’Or winner. Instead of being a genuine great of the game, this would be one of the greatest what-could-have-been stories with deep layers of intrigue …