It was almost a perfect day from Xabi Alonso's squad, who beat their arch-rivals two goals to one during El Clasico and stretch the gap in first place in the Spanish league by five points.
Jude Bellingham scored his inaugural domestic strike along with setup this term following a tough spell healing from surgery on his shoulder.
Mbappe showed his deadly performance in attack, and the manager's strategy in his inaugural derby as coach worked perfectly.
However the Brazilian's situation came to the forefront yet again.
Unhappy at being substituted, the star forward ranted as he walked directly past his manager and headed down the tunnel, before coming back to the substitute area after a short while.
As first Clasicos go, Alonso did well, considering the majority of Madrid's previous eight coaches were defeated in their debut league encounter against Barca.
Following the laissez-faire approach under Ancelotti did not deliver in the previous campaign, the new tactical system produced a significant outcome.
A specialist commented, His plan was perfect. Madrid were very good, and Barca were off-color due to Madrid's tactics.”
When not in possession, they pressed high as much as possible, if overcome, they tracked back in a structured manner, all players including the forward.”
Their defensive setup with two banks separated by 5-10 meters. The opposition were unable to break through.”
The tactical change appears to be beneficial for Bellingham, who previously had been tasked to cover multiple roles in midfield and beyond.
Theoretically Bellingham was positioned on the right, but in practice he was allowed to drift inward and link with Mbappe or crash the penalty area.
Balague continued, Employing Eduardo Camavinga in the middle, this provides more dynamism and better ability to close down the channels.”
As a result them to put Jude wide right. Certainly he would have been asked to monitor Mbappe's movements on the ball with room, connecting with him on several occasions.”
His instructions included to move into the penalty area and be around the outskirts of the area, where he poses a threat. He also drifted in to cut off passing options and make Barca's task tough.”
There's no doubting that Madridistas are fond of the Brazilian, his name was chanted on several occasions by a fervent Bernabeu crowd.
Yet recently there were numerous stories over the past period that Real Madrid could entertain allowing his departure if an attractive proposal were to come in.
Vinicius will have a year left on his deal come the end of the season, but negotiations for an extension have not progressed.
The player's reaction after coming off with 20 minutes left spoke of issues. After the full-time whistle, he had to be restrained when he moved toward Lamine Yamal.
Balague commented, Many will criticize him for good reason, since it displayed poor sportsmanship for Rodrygo who came on for him.”
However, from a young age, he has existed in a hostile world, and he feels that the world is hostile.”
This mindset is difficult to shake, notably when you believe near number one in the world, and the organization shifts the focus to Mbappe as the main man.”
“This season he has perceived that Real Madrid isn't protecting him. There are stories, perhaps from within, or unchallenged by officials, that they might accept an offer worth €250 million to sign him and allow him to leave.”
“He feels all that, so when he was taken off – justifiably, because Vinicius stopped dropping back as he should – to him he says ‘why me, why me again?.”
It may be challenging to build a bridge between the club and Vinicius now.”
Following victories in each of the recent derbies, Sunday's performance was emblematic of Barcelona's unconvincing early form.
Injuries have robbed the manager of important stars such as Raphinha, the striker plus others, and the tactical setup is not effective in their absence.
The expert said, Barcelona appear lack sharpness defensively, with less desire to win it back, less aggressive to reclaim the ball.”
Opponents find it simpler to create chances against them. If the defensive line is flawed, which was the case Mbappe's strike since the defender failed to step up, the midfield doesn't assist by teammates failing to press the ball-carrier as well as they should.”
Yamal, who troubled Madrid in previous meetings, was kept largely in check.
Key players were below par. Lamine doesn't feel like he is at his best, perhaps he's suffering from a groin issue
Seasoned blackjack enthusiast and strategy coach with over a decade of experience in casino gaming.