Former Manchester United boss Sir Alex Ferguson had to make one of the hardest decisions of his 26-year reign at the back end of last season.
He decided at Christmas that he was going to call it a day, which left him, Sir Bobby Charlton and the Glazers to decide who was going to replace the 71-year-old in the Old Trafford hot-seat.
As soon as his decision to retire was made public, there were only two real candidates to take the job.
One was Everton's David Moyes, who had impressed in the Premier League without winning a trophy, the other was Jose Mourinho, who had won every trophy under the sun.
Ferguson was given the responsibility of making one of the biggest decisions in United's 135-year history - and it looks like the Scotsman has chosen the wrong candidate.
Manchester United needed a manager who was not frightened of filling the gigantic boots of Ferguson, a manager who could attract big names to Old Trafford and a manager who would bring instant success to the Premier League champions.
Moyes, has so far, failed to tick all three boxes. The 50-year-old failed to convince the likes of Cesc Fabregas and Thiago Alcantara into joining the Red Devils and instead signed Marouane Fellaini, who has struggled to make an impact at Old Trafford.
Mourinho, on the other hand, has slotted straight back into life in the Premier League with relative ease - and bought four international players to Stamford Bridge - in Samuel Eto'o, Willian, Andre Schurrle and Marco Van Ginkel.
The Special One, or Happy One as he likes to be called thesedays, would have steadied a ship that had just lost their influential captain - even if it was only for the short term.
There's no doubting Moyes' credentials but United should have turned to him after Mourinho had a chance to replace the legendary Ferguson.