There has been plenty of debate about whether David Moyes is or isn't the right man for Manchester United.
But whatever your opinion, one thing is certain: it's been an extremely tough start to life at Old Trafford for the Scot.
However, for those who argue that Moyes must be sacked with immediate effect - the #MoyesOut Brigade, as they're now known - the question is who on earth would replace him.
You can count the number of realistic successors in the fingers of one hand, while there have been dozens of unrealistic names banded about in recent weeks.
Here are five of the most common, but unrealistic, suggestions:
5. Diego Simeone
Diego Simeone has worked wonders at the Vicente Calderon with Atletico Madrid and now has his sights set on winning the Primera Liga and Champions League titles.
Both should be considered realistic targets: Atleti have a superb group of players who all give as much effort as Simeone did during his playing days - and for those who never saw him play, that's an awful lot.
He has plenty of unfinished business with Los Colchoneros.
4. Pep Guardiola
You suspect that Pep Guardiola would have been the perfect successor to Sir Alex Ferguson at Old Trafford.
And perhaps he would have been Ferguson's first choice. However, months before he had announced his retirement to the world, Guardiola has signed a deal with Bayern Munich.
The Catalan now has his sight set on winning another mountain of trophies, to follow up from the 20+ he won during his phenomenal spell in charge of Barcelona.
3. Jurgen Klopp
Jurgen Klopp is clearly very happy at Borussia Dortmund - and there's a genuine mutual affection between the manager, the players and the supporters.
The 46-year-old has achieved great things during his five years at Signal Iduna Park and maybe in a few years he'll feel that he's taken BVB as far as he possibly can.
However, Klopp only signed a new contract in October, and it's very difficult to imagine him trading what he currently has for the poisoned chalice at Old Trafford.
2. Jose Mourinho
Manchester United missed their chance to hire Jose Mourinho.
The Portuguese coach was there for the taking towards the end of last season, but United - Sir Alex Ferguson, in particular - saw David Moyes as their ideal Manchester United manager instead.
Mourinho subsequently rejoined Chelsea, and the rest will be history.
He would not leave the Blues for United at this moment of time. Not a chance.
1. Sir Alex Ferguson
Sir Alex Ferguson isn't coming back to football management.
The Scot has made that abundantly clear on several occasions since retiring - and there's no way he would stab the man that he personally selected to become his successor in the back.
Purely out of sheer stubbornness, Ferguson wouldn't return to the Manchester United hot-seat.
Why would he risk ruining his legacy with this current team? There's a reason why he got out when he did.