The absence of these injured players will not make Real Madrid declined in their performance, rather they will stand a chance to gain more chances of very competent results this season. Vinicius Júnior is my favorite winger in the club, and I'm quite impressed with his performance, unfortunately he will be out for 6 weeks, it's really going to be challenging for Los Blancos this season. Checking the squad, crucial players are absent, from the goalkeeper, the defender and now the frontline. It would be difficult for Real Madrid coach, Carlo Ancelotti to make some adjustments in his squad and also formation.
Although Real Madrid remains favorites for the league title challenges of injury with an extensive absentee list in La Liga should be addressed ASAP. Now that key players like Vinicius Jr. is out for 4 weeks and Courtois out for the season, I personally think that the title will not go to them this season. With Vinicius Jr. who is the team's most creative player out, his absence compounds issues as well as Courtois. I may change my stance if they are successful at signing Kylian Mbappe but at the moment, I don't think they'll win the La Liga this season.
I think this is still what could still make a difference when it comes to winning the La Liga title, but everyone knows that how much impact injuries can have on the season results, specifically when the best and most important players are affected. For instance, Courtois was so important to Real Madrid and saved them so many games in the past that it now remains to be seen whether Kepa can take on that role and be that the tower of strength in the back of their game. This won't be trivial for him.
But Real Madrid is also capable of pulling off some short-term transfers within the next few days that are left until September 1st.
So apart from Real Madrid having the best team when all players are available, Barcelona is still in the race when Real Madrid is facing sudden problems like this.