It is so obvious that the game between Real Madrid and Manchester city is the toughest in the quarter finals stage and considering the fact that these both clubs are very much active in their respective leagues even makes it more difficult to predict who among the two that will advance to the semi finals.
I can say that the City vs Madrid match was like a final match. Both teams are the strongest candidates to become UCL champions. In fact, whoever wins, I think they have a big chance of becoming champions. Both teams have their own problems and there are several players who are not fit. But I think overall both teams will still show their best performance in that match. City is on a mission to win back-to-back Champions and Madrid wants to avenge their defeat in the semifinals of the previous season. Many say that City is the favorite in this match because of Madrid's performance in the previous match. But what we have to know is that Madrid is able to play very solidly and can get a win even though they don't score many goals.