Xabi Alonso's men has been playing really well in recent times. If you see the last match, they have played like they were the best team in the Bundesliga. Schick has played extra ordinary in that match. He alone scored 5 goals

. Die Werkself dominated the whole match, they had 67% possession in this match, 20 shots, and 12 of them were on target. This was a greatly one-sided match and I did not expect this match to be so one-sided. Looking at performances like these I agree with you that they are definitely going to give Bayern Munich a lot of problems. We, or at least I thought that Bayern is going to have an easy time this season. But It seems like this is not right. If Bayern makes any slip-up Leverkusen will be there to take advantage of that. And this alone is going to keep both the teams honest.
not surprised actually if the match will end with a big win for Leverkusen. Freiburg was also defeated by Dortmund with a score of 4-0 and now they have to lose 5-1 to Leverkusen. Leverkusen has the spirit to continue winning matches in the future. they are chasing Munich who has a points difference in the competition. so Leverkusen must not lose points if they want to catch up with Munich.
Before Leverkusen can be able to overthrown Bayern Munich, it means Bayern Munich will face two defeat in future and Leverkusen have to continue winning, which I doubt this will happen because Bayern Munich are currently turning up positively in their matches and I believe this will continue because the are winning with huge margin, they are only team in Bundesliga that has the highest goals scoring and also conceded less goals. I don't think you get the standings very well because the interval between Bayern Munich and Leverkusen is four points not a point. Freiburg are also doing well but not to compare them with Leverkusen or Dortmund, they are not on the same level in times of performance.
I think in football the unexpected things happen and that been said, I think Bayern Munich can still be overtaken by Bayer Leverkusen if they drop points even as they are performing well right now and scoring a lot of goals. 4 points is not too big and as a team that is trying to defend their title Bayer Leverkusen will do everything to ensure they close the gap between them and the team Bayern Munich so they they can have the hope of retaining the trophy this season. I also think
Freiburg is doing a good work this season in their performance but I don't think they have what it takes to compete with Bayer Leverkusen and Bayern Munich because the two teams have a more solid team than they have and the squad in the teams says it all.