Jonathan Wilson: Manchester United faces uncertainty trying to replace Ferguson

[Jonathan Wilson]

So he is not, after all, immortal. Sir Alex Ferguson made sure Liverpool never regained its perch, saw off the challenge of Blackburn Rovers, outlasted Arsene Wenger's Arsenal, faced down Jose Mourinho's Chelsea and finished with the upper hand over another club bankrolled by mega-rich owners, Manchester City. He could not, though, in the end, fight the effects of aging forever.

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