Actually, the one who will be more under pressure for the match is the host, Dortmund, because Bayer Leverkusen will still try their best to win in the away match. Moreover, Leverkusen is currently only four points behind the top of the Bundesliga standings so Leverkusen will do their best to get full points at Dortmund's home. In addition, Dortmund this season has not been very consistent in winning matches so Leverkusen will take advantage of this when they come to Dortmund's home.
Dortmund have so far not found good form and consistency in the league, so it is not surprising that the match against leverkusen will be a difficult match for them despite playing at signa iduna park, I think the match later will be tight and will likely depend on the performance of key players from both teams, I think in the match later, dortmund will still rely on guirassy and juliant brandt to destroy the tight defence of leverkusen, but instead I see maybe leverkusen will be able to be more dominant with wirtz will be the difference in the match later, I personally tend to see if leverkusen will win the match and continue to stick tightly to munich at the top of the standings.
Yes indeed, Dortmund will still get pressure despite playing at home because after all, if Dortmund fail to win in this home match, it is likely that Dortmund's position in the standings will be overtaken by other teams. Because after all, the points owned by Dortmund are still not completely safe, it is very clear and their position will be able to change quickly every week.
In contrast to Bayer Leverkusen, despite for example Bayer Leverkusen failing to win three points in the match against Dortmund later, but even if for example Bayer Leverkusen lost also that Bayer Leverkusen would still remain in second place in the standings. But even so, I also believe Bayer Leverkusen will still target victory because after all, Bayer Leverkusen certainly still has the ambition to be able to defend the Bundesliga title it got last season.