Alonso got consistent performances with Bayer Leverkusen throughout the season and his results would have been even more valuable had he been able to win the EL final. Those coaches who can achieve long-term stable results are valued, if Alonso doesn’t achieve anything with Bayer next season, the attitude towards him will also change, they will say that he was just lucky, or even regarding the final, a strong team could beat Atalanta, which means luck also played its part role for Alonso.
Xabi Alonso will have to maintain last season's performance if he wants to still be held in high regard in Bayer Leverkusen. Club management don't really give a damn about your past performance because they want current results. It will be difficult for Leverkusen to replicate the unbeaten run next season but they should at least make a mark in the UCL League next season. I will not totally accept that the loss to Atalanta proved that Xabi was lucky because they enjoyed an unbeaten run until they played the Europa League finals. Alonso built a good team that had all the quality to win games and they achieved much. For me, I will say that they were just unlucky to lose their most important game for the season.