Bayer had 28 chances, whilest Borussia Monchengladbach had 6. This alone shows how one-sided the match was and Leverkusen should have win. They had a lot of clear chances. Their main striker Boniface is injured, so they contracted Borja Iglesias two days ago who will be in the squad for the next game.
Injuries hampered elite teams and caused them to slack back in performance. Is Victor Boniface injured? That is not to say that Leverkusen will not maintain their marvelous performance because they are currently the top team in Germany; we have seen these teams evolve to become untouchable. Borrusia Mönchengladbach felt pleased to hold the draw against the Bundesliga's leading club. Bayer Leverkusen attempted their absolute best, but nothing worked out for them; instead, they continue to have adverse outcomes against average teams, but superior opponents easily win them.
This usually happens in football and it is not just because of less than optimal results in one match that we can argue that this team has slumped or something else.
I think the draw against Monchengladbach was because Leverkusen were just unlucky because overall they put in quite an impressive performance, but because of their bad luck, no goals were scored in this match.
For the next match I think Leverkusen will remain as usual and they will even have greater motivation.
Meanwhile, this draw certainly makes Monchengladbach more confident in the next match to be able to show their best performance and stay away from the relegation zone.