Real Madrid must spend some time to calm down from the defeat and try to come back after this shock defeat. They are still have one point less than Barcelona so it is not a too bad standing for them and with a long season, their race with Barcelona is still opening.
Yes, I think this is the first defeat for Madrid at the start of this season, so far they are playing on a winning streak and of course losing this Derby match is certainly not a failure for Madrid, because there is still a lot of time to catch up to win the Laliga title this season. This and even this defeat only made a difference of one point with Barcelona and Girona.
Atletico Madrid seems to know better how to beat Madrid at home, of course they have a lot of experience from each previous meeting, Madrid must recognize Atletico's greatness at home so this defeat must be an important lesson for Madrid so they can play better in the next match against Las Palmas , at least maintaining a safe position in the top 4 of the standings.
This is not about the fight for the La Liga title, of course this defeat will not have an impact because this is only Real Madrid's first defeat and this season's journey is still quite long, but this defeat proves that the quality of the Real Madrid team this season is not that good and there are many shortcomings. is still in this team, which means they will have little chance of winning the title if they don't improve and recover from this situation.
The Mandrid derby always presents a fierce match and indeed this season the Atletico Madrid team has been much better so they were able to get a convincing victory over their city rivals.
And Real Madrid just got their first loss because they had equal opponents since the start of last season. Real Madrid doesn't have a strong team so they can win. I am very pessimistic about Real Madrid's strength this season, in my opinion they are no better than last season.