#2 Defensive Midfield
Pogba and Matic were arguably the biggest disappointments on a terrible night for Manchester United. Both of them seemed to have really clicked and taken control of matches in the middle of the park.
However, at Wembley, you might as well have had Eric Djemba-Djemba and Kleberson in central midfield, because the two contributed absolutely nothing to United's game.
It wasn't just the fact that they couldn't seem to win the ball from Alli and Eriksen, but it was the number of times they lost possession that was worrying. Admittedly, Tottenham pressured high and the midfield area was subsequently very congested, but you simply expect more from your team's stand-out performers.
While United's defence was bad, they seriously lacked support from their defensive midfielders and the fact that Pogba was taken off, despite not being injured tells the whole story. The Red Devils were completely overwhelmed in the middle of the park and Mourinho will have to find a way to fix this issue before the next set of big matches.