As City continue a run of seven games in three weeks, Mancini feels the former Valencia man can now start to make an impression.
"David Silva is ready to play," said Mancini.
"The problem for Silva was that he never worked with us.
"He was with us for two days in pre-season then he went to the national team, then he came back, then off to the national team again.
"This was a problem.
"But he is a fantastic player, with good technique.
"However, every player who comes to the Premier League has problems for a couple of months.
"When he plays another few games everything will be normal."