4. Owen Hargreaves

In his own words, it was “possibly the longest-running transfer saga” in football. But after a several months of prolonged pursuit, United finally signed Owen Hargreaves from Bayern Munich in May 2007 for a fee of around £17million.
The Canadian-born, England international midfielder’s stock had risen dramatically in the previous year, and by the time he arrived at Old Trafford, he had become one of European football’s most highly-thought of defensive midfielders, having won four Bundesliga titles with Bayern.

After an injury-disrupted start to his United career, Hargreaves came to the fore in the second half of the

successful 2007/08 campaign with a string of tireless and confident performances in midfield and also, on occasion, at right-back. He capped a satisfying debut season with a superb penalty in the Champions League final shoot-out victory over Chelsea.

But a recurrence of his knee problem – and a subsequent double operation in the USA – forced Owen to miss almost all of the 2008/09 campaign as he made just three appearances.

It was a similar story in 2009/10 as Hargreaves battled his way back to fitness, finally making his return after nearly 20 months out of action in the Reds’ penultimate game of the season at Sunderland.