Last Updated: 10/02/14 9:43pm
Derby see out the five minutes of added time to earn a crucial victory and close the gap on QPR and second-placed Burnley to one point.
Green launched a free-kick towards the Derby box but Keogh wins a defiant header. Derby launch a counter attack and Russell delivers another devilish ball which is missed by everyone in the box.
Forsyth defends well again as QPR struggle to get in the Derby box. Russell breaks and his pass is just ahead of Martin in the box.
Hoilett bursts into the Derby box and smashes an effort towards the near post but the ball hits the side netting. Decent effort.
Bryson hits a poor free-kick beyond the wall and Buxton can't divert it goalwards, instead heading clear of the bar.
Bamford rakes his studs down Barton's ankle but escapes a booking. The subsequent free-kick from Kranjcar is floated straight into the hands of Grant.
Kranjcar's flick from Assou-Ekotto's delivery is goal-bound but Eustace diverts the ball over the bar from in front his keeper. QPR turning the screw now.
Bryson's inswinging delivery is missed by both Bryson and Dunne, meaning Green has to dive to his left to shepherd the ball beyond the far post.
Barton checks inside on to his left foot and drives a shot which is on target but Grant dives to his left and holds the ball. Another decent save from the derby keeper.
Derby defend well and launch a counter-attack, which sees the ball land at Russell's feet in the QPR box. He lashes a volley across the face of goal but QPR clear at the expense of a corner, which they eventually deal with.
Derby defender Forsyth is booked for clipping Hoilett. Assou-Ekotto prepares to deliver a free-kick from the right...
Derby win a throw-in deep in the QPR half as they try to relieve some pressure. QPR immediately win possession, though, and get back on the front foot.
Kranjcar has two opportunities to cross: The first is under-hit and easily cleared; the second is overcooked and drifts into the grasp of Grant. Redknapp is not best pleased.
QPR enjoy their first spell of pressure of the second half but Derby defend resolutely. Barton concedes another foul but escapes a booking.
QPR clear again which leads to a tussle between Hughes and Barton. The ball breaks for Forsyth but he is then tripped by Kranjcar, who is booked.
Bryson delivers a Derby corner which Barton heads clear. Derby retain possession and force another corner after a cross hits Hughes.
We've seen a scrappy opening to the second half but Russell then delivers a delightful cross into the QPR box which Bamford and Martin narrowly fail to connect with.
Fancy a flutter ahead of the second half? Here's the latest from our friends at Sky Bet: 'Derby have their noses in front and Sky Bet make them 2/7 to hold on for the win. QPR are given odds of 8/1 to win while the online bookmaker go 7/2 on the draw. Meanwhile, Niko Kranjcar to score next at 18/1 is just one of many Price Boosts on offer at half-time.'
Green miscontrols Assou-Ekotto's backpass and hurriedly clears from just in front of goal as Bamford looks to pounce.
More great goalkeeping from Grant. O'Neil picks out Hughes at the far post and his header is destined for the corner until Grant dives to his right to parry away from goal and clear of the on-rushing Barton.
Kranjcar delivers a free-kick into the box but, once again, Grant comes off his line to punch clear.
Derby look to take the sting out of a brief spell of QPR pressure, which produced only a Johnson cross that was headed clear by Keogh. QPR looking to turn the screw before half-time but they are creating little.
Assou-Ekotto is caught out this time, conceding a free-kick for tugging back Bamford. Will Hughes delivers the set-piece from deep on the right but the ball floats over everyone and out for a goal-kick.
Ward's cross towards the far post is headed back to his goalkeeper by Assou-Ekotto. Very calm defending from the QPR full-back.
Kranjcar is fouled after a lovely turn creates some space in midfield. Kranjcar delivers into the box but Wisdom heads clear.
QPR steal it in their attacking third and Johnson bursts into the box but Buxton gets across to block the shot. Grant then comes for the corner and his one-handed punch reaches the far touchline.
Derby are enjoying another spell of possession, and the stats show they have had 60 per cent of the ball so far.
Will Hughes delivers a quality ball which Buxton narrowly fails to connect with. Martin and Barton clash again, which leads to a discussion between Barton and the ref. QPR look rattled.
Hill fails to stop the ball going behind for another corner and takes his frustration out on a pitchside microphone.
Assou-Ekotto is booked for a high challenge on Bamford. Barton then gets involved with Martin but the pony-tailed midfielder escapes sanction.
Green got fists to another Derby corner but the punch lacked distance. Eustace heads the ball towards goal and Martin challenges O'Neil on the line, stopping the QPR midfielder from get a clean jump. O'Neil is furious as the ball hits the net - he wanted a free-kick.
Wisdom and Johnson tussle as the Derby loanee seeks to shield the ball out for a goal-kick. The ball does eventually carry over the line, but Wisdom needed all his considerable strength to fend off the QPR striker.
Great save from Green! QPR make a mess of clearing the Derby corner, with a ricochet off Buxton destined for the roof of the net before Green springs to his left to tip the ball over the bar.
Derby win a corner after Forsyth's low cross takes a deflection off Aaron Hughes which almost crept inside Green's near post.
Doyle feeds Kranjcar, who cuts inside on to his right foot but the Croatian's shot from 25-yards dribbles harmlessly wide.
Grant displays good handling again to catch Barton's high delivery from deep. Comfortable for the Derby keeper.
Johnson runs at the Derby back four before having an optimistic 25-yard shot which rolls into Grant's grasp.
Eustace's set-piece into the box is cleared only as far as Ward, who volleys a shot on goal but Green is right behind the ball to gather.
Barton gets back to help Aaron Hughes and the pair deny Ward a crossing opportunity before the Derby wide man fouls Barton.
QPR win a corner on their first attack, but like Green a moment ago, Grant comes off his line to catch O'Neil's delivery.
Derby have a great chance in the opening minute, but Bamford takes too long to get a shot off after he had sprung the offside trap and Hughes races across to block.
The two teams have emerged from the tunnel, with tonight's mascots being provided by the local Scouts group. Derby will be in their traditional white and black; QPR are sporting their green away kit.
Can QPR compensate for the absence of top scorer Charlie Austin? Tonight's starting line-up has scored only 11 goals between them this season. Striker Andrew Johnson has failed to notch in his last 15 appearances, while new boy Kevin Doyle has only one goal in 13 games. That goal, however, did come on his Rs debut last week.
Matt Little, a QPR season-ticket holder, is in confident mood: 'Predicting a 2-1 QPR win, expect Redknapp to pull out a crucial win and put some space between QPR and their rivals.'
Chris Green from Huddersfield foresees a high-scoring game with QPR emerging triumphant: 'QPR to win 4-2, with Kranjcar, Barton, Doyle and Maiga scoring the goals.' I'll certainly be happy with a six-goal thriller.
McClaren will know tonight's opposition well having spent some time coaching at QPR before Derby came calling. Redknapp was full of praise for the former England manager. Read what he had to say here.
QPR are looking to go above Burnley into second place, and an away victory would see the Rs close the gap on leaders Leicester to eight points with a game in hand. Derby cannot climb the table this evening but they can move to within a point of tonight's opposition with a home win.
Both sides come into tonight on the back of good form. QPR are unbeaten this year, while Derby have lost just three of the 20 games since McClaren's arrival.
Which way do you see this one going? Get in touch with your thoughts and predictions by emailing me email@example.com or find me on Twitter: @IanWatson1
QPR boss Steve McClaren has the luxury of being able to name an unchanged side, whereas Harry Redknapp has a number of injury absentees, with Matt Phillips, Danny Simpson, Charlie Austin, Yossi Benayoun and Alejandro Faurlin all missing. Debutant Aaron Hughes is one of three changes from the 3-3 draw with Burnley.
The two benches: Derby: Legzdins, Hendrick, Russell, Sammon, Bennett, Whitbread, Thorne. QPR: Murphy, Traore, Onuoha, Jenas, Henry, Hoilett, Maiga