Real Madrid was the favorite from the beginning of the Champions League competition, and for them to reach this stage and keep performing as expected, they are still the favorites and can surely win the title.
Dortmund is not in good form, they ended the season below the top four spot which means if they didn't win the Champions League, they will be playing in the Europa League next season, that is why they will try heir possible best to win Real Madrid, which is possible but almost impossible because because Madrid is a better team and in good form than Dortmund, unless if Dortmund is very lucky just as they have been lucky all these time.
Real Madrid will still be the favorite and even Dortmund will definitely be aware of this. And Real Madrid can always make their opponents feel nervous before the match starts. because their opponents are always aware of the difference in their strength with Real Madrid. And Dortmund certainly feels the same way. But even so, I like the enthusiasm that radiates from the Dortmund players and their coach. Even the Dortmund coach, Edin Terzic, seems to have high enthusiasm and self-confidence. And in football sometimes luck can trump ability. So sometimes we come across surprising match results where a team that is considered weak can actually beat a strong team. And all of that happened when luck was on the side of the team that was not the favorite.