Indeed, even though Real Madrid has substitute players, but still, to face El Classico, they must have a much stronger defense. And indeed the problem is that Carvajal is one of Real Madrid's mainstay defenders. The most likely substitute is Vazquez who is trusted by Ancelotti for the intermediate replace Carvajal Position.
Source: replace Carvajal - Vazquez
Luckily, I read the news that some of their players will return from their injuries in El Classico later, such as Courtois and Miliato who are scheduled to be ready on October 10th. So, at least this is much better than the current condition.
After the international break I'm really expecting a whole lot of improvement from Madrid because I'm believing that Madrid will be able to get a whole lot of their issue fixed already and as they are expecting players coming from injury, that will be a boost on their confidence and psychology to be able to improve their performance before the end of the season. this deal Ancelotti wants to get done is one which i see as a good one because it actually does as it will also be of great help to the team much enough, but what so most important for them now will be in trying to maintain a top position on the table. The next El Classico is indeed going to be an interesting and very tough one as both team are really informed this season lets see who turns out the best at the end of the day.Source: replace Carvajal - Vazquez
Luckily, I read the news that some of their players will return from their injuries in El Classico later, such as Courtois and Miliato who are scheduled to be ready on October 10th. So, at least this is much better than the current condition.