Yes nobody has really expected that Leverkusen will be playing this good this season.
About that they are undefeated this season for now there are still 3 matchdays to go and all can be happen here.
For sure i would love to see that they can end that season without any lost game as they deserve it and hopefully in the Cups they make it too.
Winning matches will become smooth for stable balanced elite team. At first, It was a complete joke to everyone that had a vision of Bayer Leverkusen winning oppositions and having an unbeaten streak record till this very moment. Xabi Alonso is indeed one of the promising coach for Leverkusen but everything becomes clearer when there's more achievements for Leverkusen this season. Looks like they're going home with the treble and this season will be one of the wonderful one for Leverkusen this season.
They broke Bayern Munich's unique dominance of the league. They are undefeated in the league yet and the league is almost over. They also achieved significant success in the European league. What makes Bayer Leverkusen successful at the moment is the harmony between Xabi and the players. Xabi is like one of them and the players love him very much. When they win the European league, it will become clear that the Bundesliga championship was not a success achieved by chance.