Mancini said: "I don't like players that never think it's their fault. These players can't play with me.
"Sometimes it's important that one player takes his responsibility because when you are a top player you earn a lot of money and you should play at 100 per cent always.
"I want strong players that are upset with me when they don't play but after that show me they deserve to play.
"For this reason we've said that it was important to put another two or three top players in the team."