Nani says former manager Sir Alex Ferguson would never accept the perceived social media digs from the likes of Harry Amass and Chido Obi that Amorim has received in recent days.
"No way, not a chance," said the ex-Portugal winger to the Daily Mail for casino.co.uk. "If someone needed it, he would put a player to one side for a game, and usually they would learn straight away. If you were in trouble for any kind of bad behaviour, you would only play again when you changed.
"You need to accept the rules and then you need to follow the rules. For us in that time, that was the key. Nobody was bigger than the club. No player, not Ronaldo, not Rooney, not Giggs, nobody. If you’re behaviour wasn’t good enough, you were punished.
"It actually happened to me during one of my first weeks. I played one fantastic game and then I went several weeks without playing. I was complaining, talking with Cristiano, saying 'hey, I don't know why I’m not playing'.
"I knew there was something behind the scenes they wanted me to fix, and then when I found out what it was, I addressed it, worked hard. These players need something similar; discipline and rules."