The competition between these two teams looks very tight, just like last season where Bayern Munich and Leverkusen fought for the Bundesliga title. Bayern Munich must perform consistently if they do not want to lose their first position, while Leverkusen also tries to continue to put pressure on Bayern Munich. Their meeting later might determine their results. If Leverkusen wins against Bayern Munich, their points difference will be closer and they have the opportunity to defend their title for the second time.
I actually want to believe that Bayern Munich knew it much earlier before now that they are going to have Leverkusen as their biggest rival and contender for the trophy this season so making sure they are going to be able to stay ahead of them was one thing that was supposed and going to be their priority this season and now the the distance has been closed to the point is just four point difference is some how disturbing but then Munich still have the chance to still staying ahead.
Definitely Bayern Munich would have seen them as a rival or at least Vincent Kompany who is the new coach will obviously see them as one.
Bayern Munich will try to get back better and possibly avoid dropping more points and rather hope Leverkusen drops more points. Although to me this is when the title race actually begins, from the beginning of January till the season ends, the most consistent often win the race here.