I can see because of the good performance from Xabi Alonso, he is now getting more famous and some teams are playing to hire this coach for the next season even if they are currently working with great coaches in their team.
For example, Real Madrid is still trying to find a replacement for Carlo Ancelotti because they know he is going to leave the team one day. But because of the performance we saw from Xabi Alonso, I don't think if Leverkusen let him leave anytime soon.
Leverkusen will definitely not want to let go off Xabi Alonso anytime soon, this is a team that has suffered certain level of set back over a long period of time but since the arrival of Xabi Alonso their have been a drastic change and this is something the club is very happy with including the players as their relationship with the coach has improved greatly.
I see it as a cause and effect kind of thing for Xabi to have gained so much fame and attention in a short period of time, it can be seen as the results he has produced with his team within his period of arrival up on to this time. His impressive performance has attracted so much attention to result in the Fame and the attention of other teams wanting to hire him as their coach.
Ancelotti isn't doing bad at Madrid either it's only that his contract will expire one day and he may have to leave but I think that will be on the condition that he wants to leave but if he decides to renew his contract at Madrid he definitely will be given that chance as his overall performance with the team so far has been great, winning titles and lifting trophies is enough for him not to be just allowed to go because there is someone somewhere doing well which they think they can hire.