Of course, Leverkusen's performance this season has surprised many football fans, with them always being so good in every match that they can become an unbeatable team, it shows that they have very good performance.
Even Lerverkusen would not believe that they can have an unbeaten season in Bundesliga like this. They can believe in their ability but manage to have an unbeaten season after 34 matches is out of imagination when the season begins.
Xabi Alonso has certainly made a big contribution to Leverkusen, with Leverkusen under the guidance of Xabi Alonso, Leverkusen has changed drastically, in fact it is true that Bayern Munich is not able to match Leverkusen's current strength and Leverkusen has also broken Bayern Munich's dominance.
Xabi Alonso played for many big clubs in his player career through which he worked with many great coaches and learned a lot from those legendary coaches. This helps him to prepare for his coach career many years ago and with his smartness, he applied it very well after two seasons with Leverkusen.
Coaches in Xabi Alonso's player career are Benitez, Mourinho, Ancelotti, del Bosque actually gave Xabi many lessons.
There is no doubt about Leverkusen next season, of course this team will be a strong team even against big teams, also I think Xabi Alonso will of course continue to provide good training for Leverkusen.
It's too early to say this because Leverkusen will face with a summer transfer season with possibility to lose some or many star players. Even Xabi Alonso built up a team with not too big dependence on any single star player, losing some star players will bring a lot of trouble for Leverkusen.