(CNN) -- Perhaps the most frightening scenario facing Manchester United is that however bad this season has been, it could get a whole lot worse. Embarrassed by great rival Liverpool on Sunday, light years behind in the race for the English Premier League title and on the cusp of European humiliation, it has been a year to forget for those so used to success. Since Alex Ferguson stepped aside after winning the club's 20th league title, his replacement David Moyes has presided over one of the most painful periods in the club's recent history. On Wednesday, the nadir awaits -- the possibility of exiting the Champions League at the last-16 stage to Greek side Olympiakos.
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Manchester United faces Champions League exit
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Olympiakos takes 2-0 lead to Old Trafford Wednesday
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Christian Karembeu backs Greek side's chances
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United unlikely to qualify for next year's competition
Not that @placeholder is getting ahead of himself -- Olympiakos has never won at Old Trafford and managed just one away victory in qualifying for the knockout stage.