Update: 4:17PM Manchester City powered into the FA Cup quarter-finals on Saturday, overcoming English Premier League title rival Chelsea 2-0 to maintain its quadruple chase.
Stevan Jovetic and Samir Nasri provided the goals to avenge a 1-0 league loss this month, with a formidable City in complete control and preventing Chelsea from hitting the target once.
"We can beat everyone," Jovetic said. "We learnt something (from losing to Chelsea), you could see that on the pitch."
Although Chelsea lead the league, City is only three points behind in third with a game in hand after its midweek game was postponed due to bad weather.
City also remain in Champions League contention, facing Barcelona at the Etihad Stadium on Tuesday, and meet Sunderland in the League Cup final next month.Sunderland also advanced in the FA Cup, with Craig Gardner clinching a 1-0 victory over Southampton.
Wigan maintained its cup defence by winning 2-1 at Cardiff, with Ben Watson, whose goal clinched the cup before the team was relegated from the topflight last May, netting the winner in south Wales.
With City hosting Barcelona in the Champions League on Tuesday, beating Chelsea showed the enviable depth of resources available at Manuel Pellegrini's disposalCity was far more assertive than the side that was beaten by Chelsea less than two weeks ago, with Dzeko also testing Cech with a curling shot.
"We wanted revenge today," City captain Vincent Kompany said.
After failing to get a sight of goal in the first half, Chelsea striker Samuel Eto'o was replaced at halftime, with Mohamed Salah coming on.
The January signing didn't help to transform Chelsea's fortunes.
But it was a City substitution that made a bigger impact as Nasri, in his first appearance in a month, completed an incisive move to score six minutes after coming on.
After receiving the ball from Nasri, Silva squared it back to the Frenchman, who continued his run to dart into space between defenders David Luiz and Gary Cahill, and slot the ball in from close range.
It was City's 117th goal of a season that should end with a trophy unlike last year under Roberto Mancini.
Chelsea can only win on two fronts - the Premier League and Champions League - and Jose Mourinho's side has the edge over City domestically having won both league encounters.
"Today there was a different freshness between the teams ... and one team had a week without professional football," Mourinho said.