Chelsea are three points behind City in the title race and on Monday night they will play them at Etihad Stadium, where Manuel Pellegrini's side boast a 100 per cent record.
"I think they have everything," said the Chelsea manager. "But on top of that, and I want to make it very clear that, for me, it's just a coincidence and nothing else, the reality is they have many crucial decisions in their favour. They are lucky.
"Against Liverpool, the Raheem Sterling 'goal'. The penalty on Luis Suarez. Against Newcastle the goal that is a clear goal. Against Tottenham, Michael Dawson's goal, the penalty, the red card. They are having everything.
"The referees try to do their best and normally during the season the mistakes are split. But at the moment they have everything in their favour.
"The players are very good. Even with very good players, if the manager is not good, you don't do it. So the manager also has to do good work."