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MANCHESTER, ENGLAND - OCTOBER 23: Sergio Aguero of Manchester City scores their third goal during the Barclays Premier League match between Manchester United and Manchester City at Old Trafford on October 23, 2011 in Manchester, England. (Photo by Tom Purslow/Manchester United via Getty Images)

MANCHESTER, ENGLAND - OCTOBER 23:  Sergio Aguero of Manchester City scores their third goal during the Barclays Premier League match between Manchester United and Manchester City at Old Trafford on October 23, 2011 in Manchester, England.  (Photo by Tom Purslow/Manchester United via Getty Images)