Kompany has successfully transformed Bayern Munich since the departure of their previous manager and they are almost certain to win the Bundesliga title this season, as no challenger can match Bayern Munich's points tally. In the Champions League, they will face a fairly experienced team, but Bayern Munich's ability cannot be underestimated, as they are now much stronger. A win in the first leg will determine whether both teams advance to the next round, so Bayern Munich or Real Madrid will need to be more effective in the first leg.
We can't talk about Kompany's success anymore, he is indeed capable of doing that, and you don't need to say “almost certainly” because the probability is 99% sure to belong to Bayern Munich again this season considering the remaining opponents we can still calculate their abilities, although it does not rule out the possibility of a defeat that occurs, but 9 points are very difficult to pursue and the match is only 7 matches away, I dare to bet for Bayern Munich to become champions again.
Not necessarily the first leg is decisive, because you have to realize when the match at home can be a serious threat to the visitors, can even turn things around, I am a Real Madrid supporter, but I also see that Bayern Munich is a very strong team, even I doubt to this day to say we can win easily against Bayern Munich.