#3 Injuries
Perhaps the outcome of the game would have been different had United not lost two of their most potent attackers in the first half itself. While Martial had not been groundbreaking, he was threatening down the left and was beginning to grow in the game.
However, he picked up an injury at the closing stages of the first half and Solskjaer immediately sent Sanchez to warm up. Things looked so bleak at a time that the Chilean was called back and was seen tying his boots. However Martial seemed to walk off the injury and continued the game.
A few minutes later, Lingard pulled up and it was clear that the Englishman could not continue any longer. Sanchez replaced him in the injury time of first half. Before the start of the second half, Mata was drafted in to replace Martial and with the departure of the two wide men, Rashford looked isolated.
With Sanchez and Mata alongside him, the English youngster failed to thrive and had a quiet second half. He was eventually replaced by Lukaku, but by then, United had succumbed to the injuries to their star player and had all but lost the battle on the night.