Manchester City manager Roberto Mancini has voiced his frustration with the standard of refereeing in England and claimed "the rules are not the same for everyone".

Mancini did not want to comment on specific incidents but title rivals Manchester United have benefited from two controversial penalty decisions in the past fortnight, while City were left feeling wronged when striker Carlos Tevez was harshly booked for diving in last week's defeat of Norwich.

With four games remaining and City trailing United by five points, Mancini alluded to the refereeing decisions having an impact on their title hopes, saying: "After some of the situations I saw in the last three or four weeks, I think it is really difficult for us."

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