Sir Alex Ferguson has become an institution at Manchester United and across British football. The thought of the great man not walking out at Old Trafford, not facing recurring FA charges for criticising referees and not constantly harassing the fourth official and squeezing out every minute of injury time possible.
Ferguson's legacy will be one of perpetual success and whenever he finally hangs up his suit and gives his vocal cords a rest his successor will face a monumental task in attempting to replicate his longevity and success.
Whether it's this year and going out on a potential Champions League triumph or whether the old man's got 10 more years in him, there are a number of high profile, highly successful managers who would be lined up to step into Ferguson's shoes.
So here are 10 potential candidates the Old Trafford hierarchy may be considering to replace their 20+ year veteran.