Sir Alex Ferguson is arguably the greatest football manager of all time. He's seen it all and won it all with the same club for over 25 years.
Now aged 70, he is still working his magic and is showing no signs of winding down his career. Sometimes it seems like the guy could go on forever.
However, as unlikely as it sometimes seems, he is only human; eventually he will retire. When that day comes, and Fergie is currently saying that that will be in "two or three" years time, Manchester United will, finally, require a new manager.
The seven men on this list, therefore, are the seven men who, right now, look like the best candidates for the job when it might be up for grabs in three years time.