Six games without a victory for Louis van Gaal at Manchester United has led to questions surrounding his long-term future at the club.
In fact, after three straight defeats, there appears to be a realistic chance that he may not even last until the end of the season.
Unsurprisingly, then, fans and pundits alike have been debating just who will eventually succeed him in the hot-seat at Old Trafford.
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A number of high-profile managers are available right now, but will the Manchester United hierarchy make their move?
Well, if they really are thinking of letting Van Gaal go, then it appears that these five men, according to odds from Paddy Power, are in the frame to replace him.
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Jose Mourinho - 4/6
Jose Mourinho is the standout favourite to become the next manager of Manchester United. He may well split opinion, but there's no denying the fact that he's one of the greatest managers to star on English soil.
Three Premier League successes over two stints at Chelsea most definitely prove that he has what it takes to lead the Red Devils back to their former glory, but there will still be a great deal of concern over the potential appointment.
Ultimately, Mourinho doesn't seem to have longevity and often leaves his club in the middle of a crisis. Despite securing the title with Chelsea last season, the Stamford Bridge outfit are now closer to the relegation zone than the Champions League places. Perhaps, though, it really could be time for United to take a gamble on the 'Special One'.
Pep Guardiola - 5/1
Ah, Pep Guardiola - what a fine manager he is. But will Manchester United really be able to pip their noisy neighbours to his signature?
With the former Barcelona coach set to depart Bayern Munich at the end of the season, it's not entirely surprising that England's biggest clubs are ready to make their move.
Ultimately, Guardiola is recognised as one of the most stylish and fascinating managers in world football, so a move to the Theatre of Dreams would surely suit him.
Ryan Giggs - 6/1
Is it time for Ryan Giggs to step up? Well, United's former wing wizard has been biding his time as the club's assistant manager under Van Gaal, so he may well feel that he deserves a shot at the big time.
The Welshman may well be inexperienced as a manager, but his knowledge and love for United should stand him in good stead. The dressing room will no doubt respect him, but it's far from certain as to whether Ed Woodward and Co. believe that the time is right for him to take over.
It hasn't exactly gone too well for him in the last couple of years, but how much influence on proceedings has he actually had?
Gary Neville - 14/1
Gary Neville hasn't had long in management, but it's not exactly surprising that he makes this list. One of the most well-respected pundits English football has ever seen, Neville's knowledge for the game should prove beneficial as he goes in search of success at Valencia.
Of course, he won't be thinking about replacing Van Gaal right now, but the United hierarchy will surely be keeping a close eye on his progress over the coming months.
Much like Giggs, Neville will be well aware of what it takes to become Manchester United manager, so it would be foolish to completely rule him out at this stage.
Sir Alex Ferguson - 25/1
One man that certainly does know what it takes about being the Manchester United boss is Sir Alex Ferguson. Let's be honest, it appears to be near enough impossible that the Scot will return to the dugout, but that hasn't stopped the bookmakers placing him at just 25/1 to replace Van Gaal.
It would no doubt stun the world of football, but no one is truly expecting Ferguson to come out of retirement. He has been full of surprises throughout his career, but this would surpass them all.
On this occasion, the past may well have to stay in the past and United fans will just have to remember the good times.
Manchester United fans: who should replace Van Gaal? Have your say below!