The performance of Bayer Leverkusen csn not be compared to that of their opponent when compared to the current form of the teams, you already pointed out the difference between the teams and how new they are in the champions league games which I think is one or the advantage of Bayer Leverkusen playing against them not juat that but the performance of the teams in their domestic league shows that they have little or no chance against Leverkusen. I think Leverkusen doesn't need a miracle this time they just need to stay focus be concentrate on getting better because they have a better chance of going far in the champions league this season.
In the next match for Bayer Leverkusen which they will be a guest at Brest's headquarters is something that will not be difficult for Bayer Leverkusen if the Leverkusen players still have a good enough tactic to win at their opponent's home and beat Brest as the host. I wouldn't think it would be easy, but I have no doubts about the quality of Bayer Leverkusen's players in the next match in the Champions League, because Brest's strength is certainly not quite on par with Leverkusen at the moment even though Brest will also play all out to be able to win at home.