It was really unexpected that this season Leverkusen performed so well because Leverkusen was one of the best teams and was undefeated this season by successfully setting a new record that was so good
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.