Leverkusen will still maintain their performance but not to the extend of being unveeaten because it is hard to achieve such record back to back. However, they will be playing in the champion league where stronger clubs are. Alonso will try his best to see that his men go far in UCL.
A friendly match is not important, it won't be taken seriously even if you lose a lot of goals it's not a real match.
I'm curious to see how Leverkusen fare in the Champions League with the new format there's bound to be some differences from last season, and although they haven't lost before in the Bundesliga it won't necessarily be the same in the Champions League the challenge here is too much, but expect Xabi to do well tactically.
The preseason friendlies? They're not just warmups. They're tests. Can Leverkusen's bench perform? Without their major guns, can they adapt? Because Champions League is cruel. Every game is a war, so mistakes are unacceptable
Honestly, I'm worried. With a possibly decimated team, can they repeat last season's magic? Though tactically gifted, Alonso can't perform miracles. This transfer window could decide Leverkusen's season