Pogba grabbing Henderson round the neck and throwing him to the floor? No foul.
He looked out of his depth in that half and clearly doesn't like doing much defensive work, having seen his appalling marking from corners. He seems so desperate to make amends for conceding the penalty that he's forgotten his role in the side.
It's not really been an entertaining spectacle on the whole, though. Liverpool have defended fairly well and their front three have carried the ball well, to be fair to them. United desperately lack creativity.

