#1 Lacking goal-scoring instincts
Perhaps Romelu Lukaku would have helped United be more aggressive in the final third. The Belgian has been brilliant of late and had been on a fine goalscoring run before picking up an injury that ruled him out of the game. In his absence, the other men in the team failed to take up the responsibilities.
Lingard was lively but lacked full fitness. Martial was quite effective in the left-hand side and his combination with Luke Shaw had Wolves worried. But the Frenchman seemed to have left his shooting boots back home. Marcus Rashford was inspired, shooting with confidence from various areas of the pitch and also scored a goal, but none of the front three had the presence in the box that could trouble the home team.
United lacked a proper No. 9 on the night, a target man to aim crosses at. Even the midfielders failed to have an impact, as neither of Pogba, Herrera, and Matic could muster a shot on target. United had to pay the price and are now out of the FA Cup.