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MANCHESTER, ENGLAND - SEPTEMBER 10: Manchester City Manager Pep Guardiola collides with Wayne Rooney of Manchester United during the Premier League match between Manchester United and Manchester City at Old Trafford on September 10, 2016 in Manchester, England. (Photo by Tom Purslow/Manchester United via Getty Images)

MANCHESTER, ENGLAND - SEPTEMBER 10:  Manchester City Manager Pep Guardiola collides with Wayne Rooney of Manchester United during the Premier League match between Manchester United and Manchester City at Old Trafford on September 10, 2016 in Manchester, England.  (Photo by Tom Purslow/Manchester United via Getty Images)