Leverkusen's attack is strong this season as well. If Xabi Alonso can strengthen the Leverkusen side's defense then I guess we will see a better performance from Leverkusen. Leverkusen's defenders need to work harder.
If you look at Leverkusen's dominance, they are actually very strong. Leverkusen managed to control the match. But indeed the goal is the final result. They had 10 shots on goal from 26 attempts. With this analysis, the effectiveness of the strikers must be improved, then I agree that their defense must be improved. Leipzig relied on quick counterattacks but they were more effective. It seems that Leverkusen is too confident to play with a larger number of players, so it makes them underestimate. Xabi must improve immediately, the new season starts there are still many matches. They will have a tighter schedule, so they must be able to manage players well.