Sergio Aguero's Controversial Late Goal Keep Manchester City FA Dream

Sergio Aguero's controversial late goal ensured Manchester City dramatically kept their quadruple bid on track as they came from two goals down to beat Swansea and reach the FA Cup semi-finals on Saturday.

Pep Guardiola's men looked to be heading out of the competition at the hands of second-tier opposition, but three goals in the final 21 minutes saw City come back from the brink, as Aguero  who appeared to be offside nodded in the late clincher. 

Although the Premier League champions initially looked bright, a confident Matt Grimes penalty put Swansea in the ascendancy and they doubled their advantage with an exceptionally worked Bersant Celina goal against his former club. 

The visitors upped the ante after the break and pulled one back through Bernardo Silva, before an Aguero penalty went in off goalkeeper Kristoffer Nordfeldt.

And, just when Swansea looked to have held on to force extra time, Aguero completed the comeback two minutes from the end to send City to Wembley.

Substitute Aguero beat Swansea keeper Kristoffer Nordfeldt with a diving header off Bernardo Silva's low cross at the end of a superb move in the 88th minute.

Replays showed the Argentina striker was marginally offside but the video assistant review system was not in use at the Liberty Stadium, despite having been used in City's third and fourth-round ties at their Etihad Stadium home.

"You have to ask the authorities why VAR is not here," City manager Guardiola said. "All around it is there, but here it is not. If it's not a penalty and it's also offside, I am sorry. I don't like to win games when decisions are wrong. It's not easy."

Defeat was harsh on the impressive hosts, who led 2-0 inside 30 minutes through Matt Grimes' penalty and Bersant Celina's spectacular second.

Swansea said the club was set up to use VAR given their history of being in the Premier League between 2011 and 2018.

But a club spokesman said the Football Association told them that VAR would not be used at the Liberty Stadium, even though it was in operation at other quarter-final ties around the country.

"We are in the dark ourselves over the non-use of VAR here and that it would only be used in Premier League stadiums," the spokesman told Press Association Sport.