The main issue that Xabi Alonso should seriously address is the defense, which so far hasn't looked very solid. Having a sharp attack is pointless if the defense is porous, it won't lead to success. Therefore, Xabi Alonso must find a solution to encourage Raul Asencio, Dean Huijsen, and Trent Alexander-Arnold to reach their best potential.
Last season was a bad season for Madrid. If I am not mistaken, they had 51 injuries. Only 2 players managed to stay fit until the end, Modric and Guler. According to the doctors' analysis, most of them had muscle injuries. This condition indicates that the players have a very heavy workload. As of now, I do not know about some players who are suffering from long-term injuries, I hope they recover soon. Because Xabi is indeed building a team. He should take advantage of this transfer moment to add a center-back and a central midfielder who are ready to be used.