Real Madrid's victory over Dortmund is a big favorite but there could be a surprise here. Although Real Madrid are a much stronger team than Dortmund, they still have the morale to attack strongly against Real Madrid. Real Madrid's new coach Xabi Alonso will definitely have a great achievement in the upcoming season, although he has been at the club for a few days. But it may take some time to assemble his team, but the way he is currently managing the team is very good and his preparation is very good. However, if he stays with Real Madrid for a long time, he will be able to reach a better position for the team and since he is a good coach, he can do something good.
Your statements are reasonable to me. It is clear that Real Madrid are the favourites to go to the semi-finals, but football can be unpredictable, which also means that Bayer Leverkusen could pull a surprise. Neither team was fantastic in their second-round wins. Real Madrid struggled to beat Juventus while Leverkusen was lucky to win over Monterrey. Real Madrid and Borussia Dortmund met twice last year and the Spanish side won in both encounters. But if Niko Kovac's side can avoid mistakes and play with confidence, the result might be different.