It has become the recurring theme of Manchester Citys difficult and largely unsatisfactory Champions League story, and the longer it goes on the harder the impression becomes of a team struggling to know what needs to be done to put it right. This is the fourth successive season they have failed to win their first home game in the competition and, while the damage is not yet grievous, there is already strong evidence that they might have to re-invent themselves if their latest European campaign is not going on to become another chastening experience.A club with their ambitions must be alarmed about their lack of progress at this level and it could conceivably have been worse bearing in mind the long passages when Roma, sensing the home sides vulnerabilities, threatened to pin them back.