Mustafi is running back in all those pics except when he has to make the decision and try to stop him. Bearing in mind that all of that happened in a split second there's not much all he could've done. Firmino is no Messi but he's a good dribbler and in a situation like that he won't let you go unpunished. City just conceded a similar goal, bet you they won't blame Kompany and Laporte but the guy who was dispossessed easily, just like Torreira. But I get it, the usual nonces on here will only blame guys like Mustafi and won't touch favourites like Torreira.