Amorim added: "I think we are so nervous sometimes in the game and you can feel it in the small things. The way that we move sometimes, the understanding of the game, especially at Old Trafford.
"I feel that sometimes the players are in the dressing room and we go to warm-up and we go inside to start the game, I feel that the air is heavy. These kind of things I think we show a lot in the games.
"When we suffer a goal or we have a bad moment, you feel like the connection is not there, we lose ourselves. We get lost a little bit. I understand it is more than football, more than tactics, it is something that is in the players' mind."