It's still quite early for them and they can bounce back but the question they need to ask themselves is will other clubs sit by and fold their hands while they do so because it's looking like Bayern Munich are coming back to reclaim what they lost.
I am sure, Xabi Alonso is also ready with the bad results that might happen when extending his contract at that time but unfortunately, the defeat experienced occurred at home. But even so, at least Bayer Leverkusen still has good efforts and or performance because after all, in the two matches that have been played in fact Bayer Leverkusen always managed to score first by leading the match with a score of 2-0. But unfortunately, from the two matches that have been played it seems that Bayer Leverkusen is easy to turn around by the opposing team and thus, whether the problem is in the defense line or are Bayer Leverkusen satisfied with the score of 2-0.
Because after all, in the first match this season against Monchengladbach also in fact Monchengladbach managed to equalize the score to 2-2, but fortunately Bayer Leverkusen still managed to score a goal in injury time against Monchengladbach and was able to end the match with a score of 2-3. But in the home match against Leipzig, I think Bayer Leverkusen maybe satisfied quickly because after all, in reality the Leipzig coach also got a red card in that match.
Thus, Bayer Leverkusen might have felt like they would win after leading 2-0 because Leipzig was not accompanied by their head coach in that match, so Bayer Leverkusen let their guard down and Leipzig managed to get an epic comeback.