Silva, 31, has scored seven goals so far this season. And that's exactly what City did to scorch into the lead after just three minutes.
IT was perhaps not Aitor Karanka's wisest move to suggest that Pep Guardiola was not even the best manager in Manchester - let alone the world - before Saturday's game.
Ominously for Middlesbrough, now languishing in the relegation zone after failing to win any of their last 10 Premier League games, all City's world-class players were involved, despite the fact they face Monaco in a decisive Champions League last 16 second leg on Wednesday.
Aitor Karanka's Premier League strugglers at least took the game to City in a desperate search for an equaliser but failed to carve out a genuine chance. But I don't think you can say we did not try or have a go.
A goal in each half by David Silva and Sergio Aguero sealed City's passage into the last four.
Despite dominating the first half, they failed to score more goals.
"When you attack good, you defend good", said Guardiola, who, typically, turned a blind eye to an bad first-half fumble from Bravo.
The former Real Madrid coach was berated by fans during this game for being inactive in the technical area - he spent virtually the entire 90 minutes with his hands in his pockets - while Pep Guardiola constantly issued instructions and motivation to his City players.
HollywoodLifers, do you think that Manchester City will knock Middlesbrough out of the FA Cup?
Meanwhile for the visitors, they will be without a pair of central defenders in Daniel Ayala and Calum Chambers, according to the club's site. "So we have to focus and play as well as possible".
Patrick Bamford got one of the goals when Boro shocked City at the Etihad in this competition two years ago.
"We can't forget that we were playing against one of the best teams in the league and the Champions League", theSpaniard added.
"The most hard moment for me at this club was when I arrived three years ago and we lost three of the first four games".
"We know we are in a bit of a hole, but that is when you see the characters".
Christian Stuani repudiated an excellent possibility to level the game, going directly at Bravo from Marten de Roon's identify cross.