Of course, Xabi Alonso still can't believe the defeat in the European league, even though it could be a sweet track record if they can still win the title and continue their unbeaten trend. But fate said otherwise and there Atalanta was able to become the first team to beat Leverkusen.
However, what Leverkusen achieved last season is very difficult for other clubs to beat and when they return to the Bundesliga they must refocus on doing the same thing over and over again if that is still possible. We know that Bayern Munich will really consider Leverkusen as their main rival at this time and they have to break last season's bad result of never winning against Leverkusen. That is one of the conditions if Bayern Munich can move freely to reclaim its seasonal title.
Not sure yet the success unbeaten achievement by Bayern Leverkusen when winning Bundesliga season 2023/24 has opportunity break by the other Bundesliga teams for next season. Bayern Munich as favorite team become the winner seems difficult keep defend unbeaten record such as did by Bayern Leverkusen not unbeaten all domestic leagues matches from Bundesliga until DFB Pokal Cup.
One bad achievement from Bayern Leverkusen this season after defeating by Atalanta in the Europe League final match, I think make difference the most perfect season for Leverkusen if can win Europe League and become the only one top European teams without loss all competition for one season.