Bayer Leverkusen is not crumbling anytime soon because the headcoach have distributed the elite actions that would be exhibited by the club in league matches. The only team capable of stopping them are Borrussia Dortmund and Bayern Munich this season, no time to complain but focused on the goal. Bayer Leverkusen unbeaten run continues still this very moment? I've no idea how Xabi Alonso have been able to do this because it's not been an easy run up for them in the first chapter of the season. They're threats to every opponent they have meet, nothing but streak winnings becomes their priorities.
I don't think Borrussia Dortmund will be able to stop Bayer Leverkusen this season because Borrussia Dortmund will have to fight again to get into the top four of the Bundesliga standings. But for Bayern Munich, it is still quite possible for them to stop Bayer Leverkusen because considering that the distance between Bayern Munich's points is still quite close to Bayer Leverkusen in the standings, it does not rule out the possibility of making Xabi Alonso's team difficult again in the second half of this season.