There is little decline in Real Madrid's performance this season; that's why Real Madrid couldn't perform very well this season, which caused Real Madrid to finish this season trophyless. After Real Madrid got eliminated from the Club World Cup by PSG, Real Madrid has shown concern about recruiting new players in the transfer market, so I believe it won't be difficult for Xabi Alonso to change Real Madrid's performance next season.
Xabi has a big challenge to at least bring Madrid to its top form in La Liga. After that, they must try to get the Champions League trophy. For Xabi's first season, it may not be easy. This team is not like Leverkusen, he will definitely need some adjustments with the great players in his squad. From training patterns to adaptation to the game tactics, Madrid must make everything run smoothly in a short time if it wants to perform well this season.