The full-time whsitle goes! Chelsea are through to the semi-finals of the 2017-18 FA Cup after extra-time!
120'
Offside against Mahrez! There will be one added minute as Chelsea have a free-kick in their own box.
118'
Alonso blasts a counter-attack cross in for Giroud which goes straight to Schmeichel but it further eats up the clock for the Blues. Time is almost up for Leicester.
117'
Moses earns a throw now in his own half and is in no hurry to take it, eating down the clock. Kante then earns a free-kick for a soft tackle by Gray.
115'
D. Gray enters the game and replaces M. Albrighton.
Demarai Gray is on for Marc Albrighton, who has had an excellent game for the Foxes. Five minutes or so left.
114'
Chelsea try to pin the Foxes back in their own half with an attack of their own but Okazaki picks the pocked of Moses to start another Leicester attack.
112'
Maguire tries to land a header on the effort at the far-right post; he puts it into the side netting. Chelsea hanging on here still.
111'
A corner to Leicester now, as a cross for Chilwell is nudged out by Cahill.
110'
The Blues press back downfield and win a corner, but Leicester do well to clear with Maguire.
108'
Caballero claims the corner and Chelsea clear their mark. 13 minutes to hold on for the Blues.
Minute
Description
107'
Free-kick to Leicester for a bad Pedro tackle now. Mahrez pops it into the box and after a scramble of shots again, the Foxes get a corner.
106'
...and Fousseni Diabate replaces Simpson.
We're into the second half now with two changes for the hosts; Iborra makes way for Adrien Silva...
105' +2
Two added minutes in this first half of extra time as Morata is replaced by Olivier Giroud. The visitors play down the clock and the referee blows for the break.
105' +1
O. Giroud enters the game and replaces Álvaro Morata.
105'
Pedro has scored a goal for Chelsea! Assist by N. Kanté.
Adrien Silva enters the game and replaces Iborra.
F. Diabaté enters the game and replaces D. Simpson.
That is every goalkeeper's nightmare, and doesn't Schmeichel know it. Chelsea are in the lead once more and Leicester know they have to score twice to win and avoid penalties.
Disaster for Leicester! On the stroke of half-time in extra-time, Schmeichel misjudges a leap to deal with a Kante cross between Albrighton and Chilwell - and Pedro heads home to give Chelsea the lead. What a time to retake the lead.
104'
Vardy makes a fine run down the left flank, then peels away for a cut-back cross to Okazaki; one the forward can't get onto the end of. Goal-kick to Chelsea.
102'
Good work from Maguire manages to divert a Moses cross straight to Schmeichel and the keeper clears.
101'
G. Cahill enters the game and replaces A. Christensen.
Christensen is in fact now subbed out - and Gary Cahill takes his place in the middle of the defence.
99'
Albrighton's latest cross flies ahead of Okazaki and Christensen is let off the hook after the Chelsea centre-back stumbled trying to intercept.
97'
Albrighton almost gets a cross away on the left side of the Chelsea box but then has a second thought and pulls back when Caballero comes to the edge of the box to deal with him.
95'
A brief pause as Fabregas remonstrates with the referee to look at a tackle by Vardy in the build-up - namely, a punch. The VAR is consulted, with nothing given, and play is resumed.
94'
Okazaki and Vardy nearly get their shots through a congested box, before Rudiger manages to clear.
92'
Pedro enters the game and replaces Willian.
The first change of extra time now, as Willian departs for Chelsea with Pedro on in his place.
91'
We're back underway at the King Power Stadium after the quickest of breaks; will there be a winner in the next half-hour or is this game heading for a penalty shoot-out?
90' +3
Willian looks to find a way round on the left wing but pokes it out for a throw - and the referee blows the whistle! We're going to extra-time for the first time this year in the FA Cup quarter-finals!
90' +2
Willian's cross for Fabregas only finds Simpson who taps back to Schmeichel to clear.
90' +1
Schmeichel delivers the free-kick but Morgan's header puts it out for a Chelsea throw-in.
90'
Three added minutes now as Albrighton continues to get treatment on the touchline.
89'
V. Moses gets yellow.
Free-kick to Leicester out on the left wing now, inside their own half, as Moses brings down Albrighton with a flailing arm; the Chelsea man is booked for his troubles.
87'
Another Morata half-chance now is stopped by Schmeichel at close range, the keeper smuggling the intended cross away near the left post.
85'
Chelsea clear and spark a counter of their own again, with Moses trying to lift the ball into the Leicester box for Alonso, which Schmeichel collects and clears.
83'
Leicester win a corner now after Vardy goes close from a Harry Maguire pass that slips between several Chelsea players.
81'
Ndidi has a crack from distance but pulls it wide to the right. Into the last ten minutes now of regular time now; extra-time is sure to follow unless someone can find a goal.
80'
Leicester clear Alonso's effort, and then Morata is pinged for offside with the follow-up.
79'
Corner to Chelsea now as, with a counter, Moses sees his cross deflected out by Chilwell.
78'
The pressure is on Chelsea now after they surrendered that lead. Mahrez and Albrighton both put excellent crosses in seconds apart; nobody reads the first and Okazaki comes up just short on the second.
76'
J. Vardy has scored a goal for Leicester City!
Vardy with the goal to put Leicester back on equal terms! A messy scramble in the Chelsea box after a wonderful Mahrez square cross sees Caballero save three close-range attempts - but the England striker doesn't miss with his effort, and drills it into the bottom-right corner. Game on.
74'
Time is running out for the hosts to find a leveller and force this tie onwards, as Moses gives away a cheap free-kick with an elbow on Iborra.
72'
A poor cross from Mahrez gifts Hazard the chance to spark another Chelsea counter-attack that sees Moses and Fabregas combine to put Morata close. Leicester withstand the initial pressure and then Alonso's follow-up cross spills well deep for a goal-kick.
70'
The Foxes earn a throw in line with the left edge of the Chelsea box but the Blues pinch it and counter swiftly, with Hazard and Fabregas both seeing attempted shots deflected moments later around the edge of the Leicester penalty area.
68'
S. Okazaki enters the game and replaces K. Ịheanachọ.
A great spell of sustained pressure on the Chelsea backline comes to naught as Iborra blasts a 22-yard effort well over the crossbar.
Iheanacho has done his shift now - and Shinji Okazaki arrives to try and help Leicester find that much-needed goal.
66'
Moses tries to curl a ball in low for Morata to run onto from the right; Schmeichel picks it out with a well-timed boot though and Leicester force Chelsea to scramble back to midfield.
64'
Morata clears with a header from the effort and then earns a free-kick as he tries to counter following a foul from Simpson.
63'
A mistake from Christensen gifts Mahrez the chance to cross in for Albrighton on the edge of the box; the winger's shot finds a deflection though and the Foxes get a corner.
61'
Morata is forced into an early cross, harking down the right wing, and Fabregas arrives too late to collect the ball in the box before Simpson clears to midfield for the hosts.
59'
Albrighton bends an excellent cross in for Mahrez that Rudiger manages to clear and the follow-up effort from Ndidi is a touch too long for everyone, bouncing out for a goal-kick.
58'
Schmeichel punches the effort away and the Foxes breathe a sigh of relief. Overturning one goal is tough enough; two would be an even taller order.
57'
Moses curls a lovely cross in that Schmeichel just manages to tip out with a dive before Morata can reach it. Corner to the visitors.
56'
Corner to Leicester now as Alonso knocks out Chilwell's dipping cross. The Foxes play it short and fast to Albrighton, who turns on a dime and blasts a shot on target - and straight to Caballero.
54'
Willian, recovered from his knock, plays a great cut-back pass to Hazard who is 20 yards out in front, only for the Blues man to knock it well over the crossbar. Six shots apiece now for both sides.
53'
Vardy! That was a great chance for the England man, who undercuts Moses to land a header on a Ndidi cross, only to knock it cleanly over the top. That should have been the score to tie things up.
52'
Albrighton lofts another excellent cross for Iheanacho to head, only for Rudiger to clamber over him and clear it away first.
50'
Willian goes down under an Iborra challenge and stays down clutching his ankle. Play is paused for him to get medical attention.
49'
Albrighton's cross in for Iheanacho almost finds the former Manchester City forward at the far-right post; Caballero sweeps in to claim it before he can make contact.
48'
Chelsea are pinged for offside, this time as Hazard sneaks ahead of Simpson chasing a Fabregas pass. The Blues recover though and try their luck again with Morata popping off a close-range shot that Schmeichel manages to keep down.
47'
An early chance wasted by Mahrez for the hosts; after a long ball for Vardy from Iheanacho is deflected into the path of the Algerian, he skies it somewhere into the stand behind from 30 yards out.
46'
Cesc Fàbregas enters the game and replaces T. Bakayoko.
We're back underway at the King Power Stadium with the visitors and leaders making a change at the break too; Cesc Fabregas has come on to replace Bakayoko.
45' +1
T. Bakayoko gets yellow.
Tiemoue Bakayoko gets booked as the clock ticks into an extra minute of time for a daft challenge on Iborra - and then Iheanacho is brought down 20 yards from goal, only for the referee to blow for half-time rather than award the free-kick.
44'
That is a hammer-blow of a score against the Foxes, especially given the chance Mahrez had before he was outmuscled by Willian. They're going to need a big shift in the second half to keep their dreams of Wembley allive.
42'
Álvaro Morata has scored a goal for Chelsea! Assist by Willian.
It was a fine finish by Morata, having been fed a perfectly-timed ball through three Foxes defenders; but the real star of that play was Willian with that barnstorming run. Leicester have some work to do now as they go behind.
What a counter-attack from the Blues! Alvaro Morata's confidence will have been done the world of good by that goal as Chelsea score against the run of play thanks to a brilliant run from Willian. Chelsea have the lead, with half-time just around the corner.
41'
Morgan makes something out of nothing with two great tackles and the Foxes captain sets off downfield, feeding Mahrez - but he goes down easily under Willian and Chelsea spark off a counter-attack.
39'
Simpson puts a smart cross in for Vardy from the right which Christensen manages to intercept; Ndidi's follow-up ball flies off wildly to the left for a throw-in.
37'
Kante earns a free-kick in the centre circle as he goes down, moments after Caballero was forced to fly out of his box to clear a loose ball Iheanacho was chasing. The Chelsea man plays it short and moments later, gets a shot away from 20 yards out; Schmeichel is untroubled in collecting the tame effort.
35'
A Simpson long ball, blasted from deep in his own half, is almost caught by Mahrez, who times his run well to keep onside; it just gets to Caballero first before the Foxes man can land a boot on it.
33'
Willian flicks a through-ball to Morata on the right of the Leicester box; the striker smashes it into the side netting rather than play a cut-back pass to Alonso, much to the winger's frustration.
31'
Moses bolts a cross into the box from the right, looking for Hazard or Morata; he only finds Mahrez though who hammers the ball away from immediate danger.
29'
A great passage of play between Mahrez, Albrighton and Iheanacho fizzles out when the last pass is waylaid by Kante's boot to spark a Chelsea counter. The Blues blast downfield with Morata; his shot leaves much to be desired however, sailing up and down onto the roof of the net.
27'
It's been a fairly even game so far, as Alonso puts Chelsea's first proper shot of the game on goal, straight to the crouching Schmeichel. Leicester have had less ball so far - but they have also had more efforts on goal too. A score for either side would change the dynamics of this match significantly.
25'
H. Maguire gets yellow.
Back-to-back challenges from Maguire give Chelsea two free-kicks and the referee books the England man for good measure.
24'
Vardy makes another darting run down the left flank but once more, none of his teammates are in the box to meet his cross, allowing Azpilicueta to clear.
22'
A free-kick to the Blues on halfway now after Morgan catches Azpilicueta. The visitors play it down the right, keeping it slow, and an eventual Willian long ball for Morata is collected instead by the Leicester captain, who nudges it back to the keeper Schmeichel.
20'
Ndidi goes for goal from 25 yards out and it requires a low diving save from Caballero to stop it from nestling into the bottom-left corner.
19'
Willian tries to curl it round Chilwell out on the right wing and release Hazard; his effort just drifts into touch and Leicester have the throw instead inside their own half.
17'
Bakayoko concedes a free-kick now which Mahrez floats long for Iheanacho to chase; the striker comes up just short with his clumsy first touch and it skitters beyond him in the box for a goal-kick.
15'
Hazard looks to have sparked a half-chance for Bakayoko but he puts his long shot effort straight to Morgan who spears it downfield for Vardy to chase.
13'
Chilwell does good work in the back-right corner for Leicester to stop a Moses cross and earn the goal-kick from a rebound off the Chelsea man.
12'
Back-to-back corners for Leicester but neither reap rewards as Christensen heads before Morgan the first time and the Foxes captain puts it wide the second.
10'
A free-kick now for Chelsea just inside their own half which they also play quick through Bakayoko, but Mahrez intercepts and plays a long ball to Vardy. The striker just keeps it in and lofts it back; Simpson eventually takes possession and sees his flat cross put out for a corner by Rudiger.
8'
Chelsea are pinged for offside again, this time as Willian clips a short pass through to Moses on his outside wide on the right under pressure from Maguire.
7'
A neat flick-on from Mahrez nearly opens up a gap for Iheanacho on the right edge of the Chelsea box but the Blues intercept and counter, heading downfield to the other end before Morata is caught offside from a Hazard pass.
5'
Corner to Chelsea as, with their first half-chance of the game, Albrighton deflects a cross from Moses on the right. The Blues man plays it short to Kante who then turns it in, but Morgan heads clear and Leicester shift the ball away.
3'
An early free-kick for the Foxes is taken with a quick tap after Hazard fouled Iborra, and from an Albrighton flat cross on the right, Vardy just pushes the ball around the near post with a half-volley.
1'
We're underway in this 2017-18 FA Cup quarter-final between Leicester City and Chelsea! It's the hosts who have the first sniff of the game, with Mahrez taking the ball down the left wing into the opposition half; pressure from Moses manages to force him out for a Blues throw-in though.
Hello and welcome to live coverage of the final quarter-final of the 2017-18 FA Cup, as Leicester City face Premier League rivals Chelsea at the King Power Stadium. The Blues are looking to take another step towards a second successive Wembley showpiece final – but can the Foxes spring an upset against a side they've never beaten in this competition? Kick-off is on the way.
Leicester and Chelsea have indeed met on five occasions in the FA Cup, and in all five ties, it has been the Blues who have progressed. Indeed, after their last three such meetings, Antonio Conte's side have gone on to win the competition, in 1997, 2000 and 2012 respectively.
Leicester have been eliminated from their last three FA Cup quarter-final ties (2000/01, 2004/05 and 2011/12) and haven’t reached the semi-final since the 1981/82 season, beating Shrewsbury in the quarter-final that year.
Team news now, and it's a first start for Chelsea's Tiemoue Bakayoko since early February when he was sent off against Watford. The Frenchman is one of three switches for the Blues from the side who lost to Barcelona in midweek; Willy Caballero and Alvaro Morata also come into the line-up.
As for Leicester, they make two alterations to the side who came from behind to maul luckless West Brom 4-1; Kelechi Iheanacho and Marc Albrighton come in for Demarai Gray and Shinji Okazaki, whilst Harry Maguire and Jamie Vardy look to impress ahead of the upcoming international break.
Subs: Zappacosta, Emerson, Fabregas, Cahill, Eduardo, Giroud, Pedro
Only one of Leicester manager Claude Puel’s previous seven FA Cup matches has been against Premier League opposition – he lost 5-0 against Arsenal at St. Mary’s as Southampton manager in January 2017.
No side has beaten Leicester more at home since they left Filbert Street than Chelsea either; across all competitions, the Foxes have lost to the Blues five times at the King Power Stadium, tying them with Preston and West Bromwich Albion.
The teams are out at the King Power Stadium and we're moments away from kick-off.
After a start that was seemingly all Leicester, it's Chelsea who go into the break with the lead, thanks to a dizzying run from Willian and a cool finish from Alvaro Morata. The Blues have got one foot on the steps to Wembley now; the Foxes face an uphill battle to turn it around in the next 45 minutes. At half-time, it's Leicester City 0-1 Chelsea.
Chelsea had one foot on the steps of Wembley at half-time, but Leicester came out guns blazing - and a Jamie Vardy strike from close range after prolonged pressure has been enough to ensure thirty more minutes of play at the King Power Stadium. At the end of regular time, it's Leicester City 1-1 Chelsea - and we head for extra time in the FA Cup.
Thank you for joining us this weekend - and have a good week!
Heartbreak for Leicester City, celebration for Chelsea; it's the Blues who beat the Foxes thanks to an extra-time Pedro header. Claude Puel's side gave it everything they had - but in the end, Antonio Conte's men shade them out to end their FA Cup journey. The visitors head to Wembley and join Tottenham Hotspur, Manchester United and Southampton in the hat for the draw; at full-time, it finishes Leicester City 1-2 Chelsea.
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