Ole Gunnar Solskjaer has been here before; the Manchester United manager seems to face the "biggest week" of his time in charge of the club regularly. But this one really does feel like it, with season-defining games against RB Leipzig and Manchester City within the space of five days for a team that has become, arguably, the most unpredictable in Europe. This week is a fork in the road for Solskjaer's United and they really could go either way, towards success or failure.
Nobody knows which United will turn up, least of all their manager.