The increasingly long list of player injuries has forced Ancelotti to work hard in formulating his strategy amidst a tight schedule.
Rotation is the only option that can be done to prevent players from getting tired and the worst possibility is that the number of injured players will increase. Although some players will return to training at the end of September, Ancelotti cannot force them to play too soon because of the risk of their injuries recurring.
Real Madrid is a rich club and they have many star players so that they are able to do player rotation during a long season very well but with many injury cases like this, it's terrible condition for any head coach.
Missing many key players in main squad at the same time will affect their squad power and operation considerably and even Carlo Ancelotti is an experienced and flexible coach in both tactics and player choices, this situation is actually not comfortable for him. The international break comes at very helpful time for Real Madrid as it helps their injured players to have some more days for recovery.