Xabi has been with Leverkusen for almost 3 years, so he can get to this point in need of a process. So if Bayern want instant results it seems that is also difficult to happen. Because I believe Every coach must have a process, there are not many coaches who can give a champion when he just comes. So if Bayern want him, it is also the same as the previous coach because there is no definite guarantee from Xabi.
When you're prime, you will fold arms and watch top clubs coming to place offers because they're picking interest in top coaches. Bayer Leverkusen are competitive enough to face any oppositions this season, I'm just hoping to see Liverpool vs Bayer Leverkusen in the Europa League final because they're the main clubs that will be able to fight each other, however they're both in good shape and winning have been always constant for them. Xabi Alonso is only trending because Bayer Leverkusen doesn't give up easily and continuation of their top run still exists till this very moment.