Maybe that's true, because maintaining that performance will be more difficult for Xabi to do. On the other hand, other clubs will also be very alert when dealing with Leverkusen, and Atalanta is a club that will be a role model for beating Leverkusen. because Atalanta is the only team that has managed to beat Leverkusen this season.
Even though it won't be as good as this season, I hope they will at least still show something great and be able to provide competition, especially in the Champions League. This will be a place to prove for Xabi Alonso that he is not only great at domestic level, but he can also compete in the biggest competitions in Europe. If he succeeds in bringing something extraordinary again in the Champions League, then he will become a coach that many big clubs will compete for, because in just one season he received many offers, but he prefers to stay with Leverkusen for at least one more season.
Alonso this season has done things that are impossible for previous Leverkusen coaches to do, winning the Bundesliga and also DFB Pokal unbeaten will certainly be an achievement that Leverkusen fans will remember forever, failure to win the Europa League trophy this season is certainly not something that indeed damages or tarnishes all the positive results they get, Alonso has managed to build Leverkusen into a fairly perfect team even without star players this season, but next season will certainly be a big challenge for Alonso to be able to maintain Leverkusen good and consistent performance.
Next season Alonso will play in his first Champions League as a coach and of course he has bigger targets to achieve, maintaining an unbeaten record is of course impossible, but to still be able to maintain Leverkusen's form is still possible, if indeed next season they do not lose many of their main players and of course Alonso still needs 2 or 3 new players who are able to make their squad better next season.