Analysis: Reds must tighten up at back

[Getty Images]The Manchester United fans could hardly believe what they were watching as Ainsley Maitland-Niles produced the best moment of his Premier League career.The season might only be three weeks old, but it has been a painful campaign for United supporters.United lost at newly promoted Hull City on the opening weekend of the season, and their failure to win on the road has come as a result of a defence that is being breached too easily.In addition to conceding twice at the KCOM and Hill