When Paul Pogba rejoined Manchester United in 2016, he explained how moving back to Old Trafford would help him achieve all the aims he has set himself for his career. Winning trophies, playing at the top against the very best for a club with a clear identity and direction, etc. But this hasn't been the case. Yes, United went on to win the Europa League in 2017, but winning such competition wasn't exactly what the world's most expensive player at the time signed up for. No, he wanted Europe's...