I agree with you about Dortmund chances in Champions League. Even though they are not doing well in Bundesliga they seem to play better in European games. They have beaten Sporting three out of four times they played each other which means they might feel more confident going into game. This, plus their experience in Champions League makes them tough team to beat. I think it will be exciting match that could go either way with Dortmund momentum possibly helping them win either in regular 90 minutes or in extra time.
In fact, in the Champions League match between Borussia Dotmoon and Sporting Club, I do not want to keep any team ahead at first, the performance of these two teams is almost the same. This year's Burussia Dotmoon in Bundesliga looks like a very weak team, and their performances and statistics are not very comfortable. Still, they have the opportunity to do well in the Champions League because their opponent Sporting Club is unable to do well in the Champions League. So maybe Borosia Dotmoon will try to win the match according to that opportunity. But we might not forget that the Sporting Club is doing the best of the season in their home league this year, so this match will not be easy at all.