If we talk about theory then I might add that whoever can beat Madrid or Manchester City then they will become champions and it happened in the last 2 seasons where in the previous 2 seasons Madrid beat Manchester City and they managed to become champions while making their dominance in the acquisition of the UCL trophy more difficult to pursue and last season when Manchester City managed to beat Madrid after that they managed to bring the Champions League trophy for the first time in history to the Etihad stadium.
This season I will hold this theory again when the two clubs now meet in the quarter-finals then who will win in this match then they will be the champions in the Champions League although indeed this season seems to be tighter in terms of competition than before still I will put forward this theory.

But on the other hand this is also not only based on theory alone because after all this depends on how their performance on the field so if they really want to win then they must make it real with a good performance in every match they will run.