#1 Set-piece woes, shocking individual errors, and.....Daniel James

The number of individual errors is too much. Victor Lindelof losing the aerial, Maguire failing to track back, Wan-Bissaka letting Zaha cut into the box and nobody picking the loose ball or van Aanholt up, Pogba losing possession at an important moment, Rashford's failure to convert the spot-kick, de Gea's failure to stop the shot - every minute error acted as a catalyst for Manchester's loss.
Set pieces. Almost all set pieces were aimed deeper into the far post - way too predictable. Harry Maguire was the target from most free-kicks and nothing came off the eight corners that United won. Rashford blazed his two direct free-kicks without any threat to goal.
If United have one positive to take, it has to be Daniel James' performance. He scored a wonderful curling goal to pull things level for United and was good down the wing in the second half, both on the ball and off it.
If not for the goal and his movement, he deserves praise for his appetite and composure. James is slowly installing the 'end product' that people demand from him.