If United fail to progress from this group, their collective response to two red cards will be the main reason.
Unlike Casemiro’s meltdown after his departure from Galatasaray, you can feel a little sympathy for Ten Hag and his players this time around.
Rashford’s inadvertent red card was unfortunate and 13 minutes late in the first half left his team-mates waiting for a much-needed regroup.
But in that defeat to Galatasaray, tonight and even in the opening defeat to Bayern, it was game management that was required.
He was something United could rely on last season, with Tin Hagg recently cited as a key part of their success in the Carabao Cup, but has rarely featured this season.
Instead, the rapid-fire collapse made qualifying from this Champions League group more difficult than it needed to be. United have conceded two in five minutes at Bayern, two at Galatasaray in 10 minutes and now two in nine minutes at Copenhagen.
United showed composure early in the second half to take the loss against the Danish champions, then conceded again at the death. This group must remember how to see difficult parties.