Everyone knows how important Xabi's role was in turning Leverkusen's game into a very strong one. I think they are very ready for a competition as big as the Champions League. and they will be able to compete with other strong European teams.
they prepare better, I'm sure they won't end up like Napoli last season. where they won Serie A but then they had great difficulty competing with other teams both in Serie A and in the Champions League.
Alonso ability to build the team and also bring Leverkusen this season certainly makes us quite impressed, and even as a young coach and also a beginner Alonso was able to bring Leverkusen to their first trophy in 120 years, this season Alonso was able to bring a lot of changes to the Leverkusen squad and I think he has managed to create a squad depth that is quite capable to be able to compete next season, next season will certainly be a real test for Alonso to be able to maintain their performance even though most of their squad is only filled with academy players and also not star players.
We can't equate Napoli last season with Leverkusen this season, Napoli suffered a slump after the management had a bad relationship with Spalletti and finally fired him as coach, while the Leverkusen management did not have a change in their plans and also their trust with Alonso, so I think Alonso will still be able to handle his team freely without any pressure from the team management, In addition, frequent changes of coaches certainly make Napoli performance worse and of course it is much different from Leverkusen today.