Despite constant speculation about who will eventually replace Sir Alex Ferguson as Manchester United, it seems we are no closer to finding out who that person might be.
But here is a look at some possible candidates.
Jose Mourinho | Real Madrid
Surely the fans' favourite to take over the job. Since announcing himself as 'The Special One' Mourinho has embarked on an impeccable club management career, winning a host of trophies including two Champions League titles - with Porto and Inter Milan - and four domestic titles, amongst a host of cups right across Europe.
Simply, everything Mourinho touches, turns to gold.
Pep Guardiola | Bayern Munich (from July 2013)
Although Guardiola is yet to begin his tenure as Bayern Munich boss, the trail of trophies he left at Barcelona has left him with a very impressive CV.
With three La Liga trophies, two Copa del Rey triumphs, two Champions League title, plus two Europa Super Cups and two Club World Cup wins, the Spaniard is already one of the managerial greats.
Jurgen Klopp | Borussia Dortmund
Although Klopp is fairly new to the dizzying heights of Champions League football, his team have just progressed to the semi-finals - a feat not achieved by any manager of Borussia Dortmund for 15 years.
He also managed his side to two Bundesliga victories, seeing off the dominant force of German football, Bayern Munich, while he also claimed a DFL Super Cup in 2008. Perhaps a man on the rise up the managerial ladder of excellence? Even if Ferguson does hold on for another few years yet, Klopp may just be biding his time in Germany.
Louis van Gaal | Netherlands
Van Gaal has enjoyed a managerial career spanning over 20 years, with five clubs and the Netherlands national team. The 61-year-old has experience in abundance - and has recorded a Champions League win and three domestic league wins, amongst countless cup victories at Ajax.
At Barcelona he won two La Liga titles, a Copa del Rey and a Super Cup, while at Bayern Munich he secured a Bundesliga Shield, a Super Cup and a DFB-Pokal win with Bayern Munich. Van Gaal is currently in charge of the Netherlands national team, proving he is a man used to the big occasion. And perhaps more importantly, used to winning a trophy or two.
David Moyes | Everton
David Moyes has worked miracles at Everton. With strict resources and some big player losses over the years, Moyes has still ensured Everton's reputation as an ever-present club in England's top-flight, even guiding them towards Champions League qualification in recent years.
However, Old Trafford is a big step up from Goodison Park. Many proven and tested managers have struggled with their chance at the 'bigger clubs', most notably the current England manager Roy Hodgson. After working miracles in a similar manner at Fulham, he got his big chance at Liverpool, but failed spectacularly.
It's looking as though Sir Alex will end his time at Old Trafford as and when it suits him - and rightly so - as he marches onto a probable 20th title with the Red Devils.
Any manager filling the colossal gap left by the Scotsman will have to be the very best. This group accumulates a mix of honours, nationalities and experience - but are any of them capable of taking over from Ferguson?
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