Leverkusen was not going to stay unbeaten again, this is simple football logic I expect the fans to have really understood before have the unrealistic expectations of the team, since the erra of morden football, I doubt if there have been a time any team has been able to maintain an unbeaten record at least twice in a row, so expecting Leverkusen to have done that is really crazy, they should be applauded for their last season performance already and allow them do that which they can do in this new season and not necessarily trying to keep hopes high for them and later feel disappointed. The most likely realistic achievement they can really get at this point is winning the bundesliga title this season but unbeaten again is typically far from it.
It is impossible to keep the unbeaten record, Leverkusen already experienced a lose in the match against Leipzig. I am quite surprised that Leverkusen got a first defeat in their home. I think they will get a draw or win against Leipzig. They really dominated the match, unfortunately they only scored 2 goals. I think they are just unlucky in the match, they have done their best.
However, it is true that they are still possible to win the title. It is still in the early of the season, there are many chances to get points. But I think it is time for Xabi Alonso to evaluate the tactics. He should focus on the attacking only, he must be more aware about the defense. I think Leverkusen defense is decreasing a lot, Xabi should wisely choose the best defenders and goalkeeper in every match. I don't know why he choose Kovar over Hrádecký in the match against Leipzig.
Leverkusen defeat was like luck for Leipzig when they were able to score 1 winning score when they knew Xabi tactical weaknesses. Last season Xabi had a perfect strategy and tactics but such strategies could always be known by other team coaches and finally the strategy could be destroyed. What you said is very true that Xabi needs another evaluation to see the mistakes in yesterday's match which was planned to end in a draw but failed when the defense was a little careless. If Leverkusen wants to get a record like last season, he should have an alternative strategy so as not to lose points in every match and after the defeat against Leipzig I always analyze more deeply to bet on every Leverkusen match. Because previously I said last season that an unbeaten record would be difficult to maintain.