Rob in West Midlands: Re Izzy Brown. He's an ex-West Brom Academy player who Chelsea poached and his playing career has gone backwards. He would have been a regular at West Brom but like all our other future England talent they find themselves in the reserves or on the bench at other clubs.

Brown is sitting on Chelsea's bench today.

Another change for the hosts. Bobby Zamora has certainly put in a shift today. The hard-working QPR forward comes off with Junior Hoilett providing the fresh legs. The title race over? Maybe not. Those in Arsenal and on both sides of Manchester will be happy if it stays the same score for the next 10 minutes.

Ian Ashworth: For all the money spent, take Costa out of this Chelsea team and they look very average.

Jordan Mundy-Gill: If Juan Cuadrado is the answer, you're asking the wrong question.

Samo Alfred: If QPR had played like this for more than half of the season, they wouldn't be fighting for relegation.

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Clint Hill is still on. QPR have only kept one clean sheet in 2015 so not a game to leave unless you have to. The hosts have a half-chance but Charlie Austin's shot on the turn is straight at Thibaut Courtois.

QPR have been excellent defensively with Chelsea's shots on target gauge still showing zero. But worrying times for QPR as Clint Hill is struggling after taking a knock. He stays on though at the moment as Niko Kranjcar comes on for Sandro. Willian is replaced by Juan Cuadrado for Chelsea.

Sandro gets a caution after a clumsy rugby tackle on Oscar. Sandro joins Bobby Zamora in the book, who was cautioned just before after fouling Cesar Azpilicueta.

Matthew Bennett: Barton for England, are people joking...what we don't need is another flaky midfielder with discipline problems?

Joe France: However good Barton was or is, someone who spits or punches with his regularity rules himself out of ever representing England.

Jay Jay: Some of you need to stop drinking the Joey Barton juice. He's played well but he was never England quality and never will be.

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Image source, AFP

It's derby day in Manchester - red against blue. We've gone live with a dedicated live text. Check it out here for all the pre-match build-up. Tom Rostance is in the chair.

BBC Radio London

Former Charlton midfielder Paul Mortimer: "This is like defence versus attack! Chelsea are camped around QPR's box looking for a shooting chance, but the home side are standing firm at the moment."

Hearts in mouths for a few Chelsea fans. Gary Cahill's backpass doesn't have much juice on it, and Thibaut Courtois, maybe Chelsea's best player so far today, just about gets there to launch the ball to safety under pressure from Charlie Austin.

Image source, AP

The last time Chelsea failed to score in a match? Any guesses?

Full marks for anyone who said the 0-0 draw at Sunderland on 29 November. With just over 20 minutes left, Jose Mourinho's side have not had a shot on target.

Johny Bravo: Joey Barton today proving why he should have been an England regular in his prime. Heart and desire. Something England hugely lack.

Yullaw: Agree about Barton, he is a top midfielder and what's admirable as well is how he picked himself up time and again.

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What reflexes from Thibaut Courtois. Bobby Zamora's low ball from the right is played into Matt Phillips's feet. He swivels in the penalty area, creating some space away from Nemanja Matic, and blasts his shot goalwards. But the keeper gets two hands to the shot and pushes it behind.

Image source, Reuters

BBC Radio London

Former Charlton midfielder Paul Mortimer: "It's about concentration levels for QPR now. Chelsea have players who change things at the flick of a switch. Physically can QPR keep this intensity up, on a sunny day like this, having played midweek?"

The first booking of the match. It is a deserved one too and heads in Didier Drogba's direction. He chops down Sandro with a lunge from behind and sees yellow.

James Marshall: We need a QPR goal to waken Chelsea up. It's as if they are quite happy with a point here.

Gareth: Once again you really have to query why we sold Romelu Lukaku last summer. Diego Costa has got dodgy hamstrings, Loic Remy has always been injury prone and now we are relying on a 37-year-old has been.

Sam in Telford: Joey Barton has been the difference in midfield today. On his day, surely good enough to be named in the England squad? Determination and bravery.

QPR goalkeeper Robert Green has to tip over a sliced clearance from centre-half Clint Hill. Oscar, who has just come on, takes a corner which Karl Henry bundles out. Another corner from Oscar, a bit better this time. Branislav Ivanovic throws himself at the ball, but fails to connect properly. Chelsea's best spell of the match.

Image source, Reuters

Right, Jose Mourinho has had enough. Oscar comes on with Ramires heading off. Will Oscar be the difference? The game is in need of some inspiration.

Image source, AP

Branislav Ivanovic goes down after a challenge from Joey Barton. There didn't look much in it. But the defender does not impress Barton, who wags a finger in his direction and tells him to get up.

Image source, Getty Images

We have not seen much of Didier Drogba today. He has a half-chance after Mauricio Isla stops Ramires, but the ball falls to the 37-year-old who lashes an effort well over the crossbar.

Image source, Getty Images