From being one of the first names on the team sheet under Amorim's predecessor Erik ten Hag, Mainoo has lost his spot in the XI, starting none of the opening three Premier League games and making just one appearance off the bench.
When asked by reporters how Mainoo is reacting to the situation, Amorim said: "He’s not used to fighting for his place, maybe. He’s uncomfortable, but he’s a very good kid. He wants to learn. Sometimes it’s hard to push different things from the players."
After being reminded of Mainoo's credentials and contributions to the Red Devils, Amorim made a comparison with Vitinha, who is often considered as one of the best midfielders in the world at the moment. "I remember Vitinha was not playing for Wolverhampton,” Amorim responded. "Nowadays, you can see that Vitinha is maybe the best midfielder in the world. So you never know. Something can happen sometimes.
"The way I play is completely different from the last manager. I watched a lot of games from the Premier League in Portugal. You can feel then that Manchester United really [played in] transitions. He was the only guy that calmed down the game. Now we have other players that calm down the game.
"Sometimes I expect more from Kobbie Mainoo. Sometimes, maybe if I start [him] more, Kobbie Mainoo is going to play and he’s going to get hard to take out. I need to go with what I’m feeling at the moment and that is the only feeling. He’s starting the final of the European Championship in a team that has a lot of talented players – [Phil] Foden played that game, [Cole] Palmer was on the bench. He was playing. I know all that, but sometimes I have a different way of seeing the game."