Going into the game, Amorim had branded United's academy players as "entitled", though still threw on Fletcher and Lacey in the second-half at Villa Park.
Amorim said, "It is really strange. During this year, especially at this time, we have so many problems, but we have to cope with that. I think Fletcher did his first game, so that is good news, Lacey the same, so we will try to find solutions and go for the next game.
"I am a manager for six years and even Sporting is all about the academy, so it's about the history. Every manager wants to bring players through from the academy and not spend money because this gives value to the manager.
"I just want to win and want to be certain that the players that come in from the academy are not going to suffer too much. I'm just trying to help the club, it doesn't matter if it's from the academy or abroad."