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City now eight points behind Chelsea
Aguero scores two solo efforts
Demichelis diverts header into his own net
Austin has 2 goals disallowed before scoring
The FA Cup
Live on the BBC
The BBC Sport website is the only place to see the goals from the first round of the FA Cup.
Follow this link to our FA Cup video section and enjoy at your leisure.
Luke:, external Roy Hodgson is in the stands at Loftus Road. Can he take out Joe Hart or James Milner and put in Charlie Austin at this late stage?
Ugo:, external Someone explain why Rickie Lambert (zero goals this season) is in the England squad and Charlie Austin (six goals) isn't.
Rangers are on the front foot now - Richard Dunne* putting in a worldy of a cross with his left foot and picking out Eduardo Vargas on the edge of the box, whose volley hits Steven Caulker before going out of play.
* Yes, it was actually Richard Dunne putting in a worldy of a cross.
Absolutely superb defending from Fernando, who gets back to cut out Charlie Austin's cross before it meets its target and becomes a certain goal.
As it stands, Manchester City are eight points behind Chelsea. They have 30 minutes left to change all of that.
Image source, Getty ImagesThis game has been played in fifth gear from the very first minute and Manchester City continue to attack with purpose, while Rangers break in numbers the moment the champions lose their way.
Another booking, this time for Bacary Sagna who loses out to Leory Fer then brings the marauding Rangers midfielder down.
Tom and 20 others:, external Just found this in the FA rule book (appendix six, section 29): "Manchester City won't win anything this season if they carry on like this."
Again City roll the ball along the QPR goal-line and fail to convert - this time Sergio Aguero failing to gamble on Yaya Toure's cross. It only needed a touch.
Image source, ReutersJoey Barton gets himself involved by clattering into Fernandinho, who's still feeling his lower leg throb 60 seconds later. Reducer.
BBC Radio Manchester summariser Fred Eyre at Loftus Road
"I fancy Manchester City to go on and win this now. I have seen games like this before, where teams down at the bottom of the table play way above themselves in the first half, before the team with the better players takes control in the second.
"Sergio Aguero is constantly on the shoulder of the QPR back four and set up a golden opportunity for Yaya Toure (see 48 mins) in collusion with Samir Nasri."
Now it's QPR's turn to go close - Leroy Fer's shot taking a wicked deflection off Martin Demichelis and going just wide. The subsequent corner kick is headed wide by Steven Caulker.
It's end to end now - both teams looking positive after the break and Samir Nasri flashes a cross along the goal-line which Yaya Toure is inches away from turning in. Think Gazza against Germany in 1996.
Quality defending from Mauricio Isla sees the Rangers defender deny Sergio Aguero in the area with a well-timed tackle.
Michael, St Neots: All of the vitriol towards Mike Dean from the fans who don't know the rules themselves just shows what an impossible job refs have. They're trying to please people who don't know what they're talking about. Leave it to the professionals guys. Or at least get your facts straight before you get your knickers in a twist.
Simon, Bath: So all these keyboard referees should be congratulating Mike Dean rather than slating him.
And we're back under way at Loftus Road.
There's been plenty of needle in this game, so Rangers boss Harry Redknapp has sent on Joey Barton to calm things down. He's on for the injured Sandro.
Image source, Getty ImagesBBC Radio Manchester summariser Fred Eyre at Loftus Road
"Where to start? We have had offside goals, a goal cancelled out by the referee because the goalkeeper took a free-kick incorrectly, a real wonder goal by Sergio Aguero, but tainted by a hint of handball, and a real fairy-tale story from Charlie Austin, coming up from non-league football on the south coast to be a constant menace in Manchester City's side.
"We've had players flying into tackles, Richard Dunne making tackles like his life depended on it, we've seen Dunne at his best. It has been a scintillating first 45 minutes, and incredibly, more to come."
Paul Cate:, external Let's give referee Mike Dean some credit. That was some incredibly quick thinking in a pressure situation.
The FA Cup
Live on the BBC
The BBC Sport website is the only place to see the goals from the first round of the FA Cup.
Follow this link to our FA Cup video section and enjoy at your leisure.