Amorim made the decision based on their behavior around teammates, performances in training, and overall conduct, which he assesses in detail, including how they interact with teammates and even how they dress in the morning.
Amad Diallo won a penalty, which was converted by the captain, and then scored the winning goal by latching onto a through-ball from Lisandro Martinez.
The key moment was Amad Diallo's winning goal in the 88th minute, which turned a 1-0 deficit into a 2-1 victory for Manchester United.
Amad Diallo has been a bright spark for Manchester United, scoring crucial goals, including the winner against Liverpool in extra time and the decisive goal in the derby.
The victory was significant as it ended a 15-game winless streak against the traditional big six teams away from home, with their last such win being in October 2021.
The players celebrated enthusiastically, with Amad Diallo being lifted by his teammates, showing a deeper affection for him and the team's joy at winning at the Etihad.
Amorim's tactics involved a more patient build-up play, with United circulating the ball rather than playing on the break, which was unusual for a derby.
Mason Mount's injury disrupted United's pressing scheme, which revolved around him and another player joining the press, forcing a change in tactics.
The win boosts confidence among the players and fans, showing that Amorim's tactics and leadership can lead to victories against top teams, even in difficult circumstances.
The decision sent a strong message to the squad that Amorim is in charge and expects a high standard of behavior and performance from all players, regardless of their status.
Amad Diallo flipped a dismal derby on its head in the final ten minutes as Manchester United came from behind to win at the Etihad Stadium.
Ruben Amorim took a sizeable gamble by leaving Marcus Rashford and Alejandro Garnacho out of the squad and, with Mason Mount injured after fifteen minutes, it looked to have backfired.
However, the young Ivorian won a penalty which his captain put away and then latched onto a Lisandro Martinez through-ball to finish from an acute angle.
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