Man.City, who are in good form in the premier league, have to face Bayern Munich in the quarter finals and this will be tough for them. No matter how strong they are in domestic competition, they always have trouble facing the European giants. On the other side, inter is likely to make it to the semifinals, while madrid vs chelsea and milan vs napoli will be 50% vs 50% matches.
Milan vs Napoli match which will be 50:50. that's because before Napoli could be superior to Milan, but in the previous meeting Napoli were destroyed 0-4. this makes the fight will take place unpredictable. both are pretty even.
but for Madrid vs Chelsea. I don't think Madrid will suffer. at least in the first leg Madrid will win. and in the second leg they will only defend. although I know, sometimes matches in the Champions League are very difficult to predict.