In my opinion, it is natural that Dortmund is able to reach the semifinals of the Chmampion League because they have quality and the problem is that they are slumping in the Bundesliga because they are unable to maintain consistency.
Bayern Leverkusen have confirmed themselves as Bundesliga champions this season, of course their focus is no longer that strong, let alone having to shift their focus to the Europa League competition, so in my opinion it is very likely that Xabi will rotate a lot of players so that his core players can be at their best. when facing an important match, and I think that's quite normal for a coach to do.
And on the other hand, Dortmund is competing fiercely to finish in the top 4, so the match against Bayern Leverkusen will be quite fierce, especially since Dortmund will be playing at home with great motivation, so in my opinion it is very likely that Dortmund will be able to break Bayern Leverkusen's dominance unbeaten this season.
Dortmund in previous seasons have been very much active and eager to chase the trophy. Although at the moment the chase is off for the trophy but their fight is not finishing in the top 4 spot. They've still got every chance in store to prove themselves. They've had scaly strides from the start of the season up until few weeks back where they first ensured a victory over Munich then also, they've done well to scale through to the UCL semi finals after conquering their Spanish opponent Atletico Madrid. No one knows their fate in the next round but there's certainty that there's difference in their performances now.
They're a good team that just needs to find back their balance, there confidence level has dropped big and corrections needs to be made soon enough too. There's no time out to let go off winning chances, it'll keep drawing them back. Overtime, they've had good players in the team going off to other clubs and making wave which only notes that they're a team that builds and carves up players to be exceedingly top notch in performance. And it's acceptable that there are still players in the team that currently are capable of keeping the team ahead. Their game against Munich was a tough one and they were both sides that were and are still considerably competitive to themselves.
They were impactful and they knew how best to get the desired results, capitalizing on Munich's backwardness and Dortmund had the right goal scoring ability and they did well at keeping up heated tussle paces with the team. For their encounter against Leverkusen, the two teams are good opponents to themselves. The 3 points of the game would have to be fought for extensively.
Knowing that Dortmund have advanced in the UCL and Leverkusen having all it takes to counter the UEL pressure too. Also Leverkusen being the reigning league champions with an unbeaten record. The game definitely would have a few goals in it, I doubt a clean sheet being kept but I'm more positive that Leverkusen won't start now to spoil the record so far made this season.