Do you think that Leverkusen's defeat was because they underestimated Atalanta? no friend, this is the final match and anything is possible in the final match. Moreover Leverkusen is not a team that has a strong mentality when playing in the Europa League final match which has a very high mentality so I am not that surprised by what happened and also in every season The Europa League always has big surprises, and again and again this season big surprises have happened and even in the final match.
I watched the UEFA Europa League final game between Atalanta vs Bayer Leverkusen and in my own personal assessment of the game, I think the German club were too confident in that game ahd that cost them the ultimate prize. The Italian team were more determined to win that game while the German Bundesliga champions were playing like a team who's very convinced that they'll definitely win the game and even when they were two goals down, Bayer Leverkusen were still playing like they've got everything under control.
Xabi Alonso have achieved tremendous success this season but could've achieved more if he was very cautious of Atalanta in that final. Ademola Lookman who scored a hat trick in that game was simply unstoppable and that was why he was able to give Leverkusen a good run for their money.