Preseason friendly are like nice appetizers before a large meal - they look good but don't reveal the whole story.
Barcelona, for example. They were scattered against Monaco and Real Madrid. Coach Xavi is certainly testing his best lineup and strategies. Thats smart, but we shouldnt overinterpret the outcomes. Even in meaningless friendlies, Real Madrid looks sharp. Well-organized, confident, and hungry. They're the team to beat now.
Xavi is no longer in charge of Barcelona, having been sacked as Barcelona coach and now Barcelona are coached by Flick who generally still needs to see every potential in his players before the official season starts. Although their own rivals like Real Madrid have started to show their sharpness and strength in yesterday's match against Atalanta, so the teams in La Liga also know that Real Madrid will still be their tough competition for the coming season.