#3 Lack of intensity
Don't be mistaken, Alexis was extremely poor just like the rest of his team at Wembley and failed to get anything going in attack. But at least he was one of maybe three players who tried to get the Red Devils on the right track.
United's performance was lacklustre at best and half of the players appeared to not even be on the pitch. While there were several uncharacteristic and easy mistakes, Mourinho's men just never got a foothold in the game and were outbattled by a more passionate Spurs side.
The Red Devils simply couldn't handle the aggression and determination of Pochettino's highly motivated unit and they paid the price. The last 15 minutes in particular, historically marking the beginning of 'Fergie Time', where United always appeared to find another extra gear, were dreadful.
United were without a chance against their opposition and they lost 2-0 despite Harry Kane missing chances that he would normally convert in his sleep. Mourinho's men can consider themselves lucky they didn't concede four or five in a disastrous display.