The good thing is Xabi Alonso has a system that works, the bad thing is that systems stop working when the things that made the system work are gone. This is what could turn into a problem for Alonso when his players leave for the games with their national teams. There can also be injuries, which if a key player is affected cannot be underestimated as hardly any team has the player resources like Bayern Munich to make up for that without losing quality. The question about the validity of the system has been answered, it works. But whether all parts remain intact is the question now.
Injury is one of the risks that can occur when conditions on the field are not conducive, so that playing on the field becomes unhealthy and unpleasant. However, Xabi Alonso must still have a backup strategy to still win the upcoming match in January next year. At least there is still sufficient time to recover the condition of the injured players, and there is sufficient time for Xabi Alonso to find a solution to the problem that is currently affecting him.