FT: Luton 2-3 Chelsea! All over in Luton and Chelsea go through, but not without a fright. Burke gave Luton an early lead, Saul levelled, but Cornick made it 2-1 Luton before the break. Chelsea were the better side in the second half and in the end, their class told. Werner levelled the scores in the 68th minute and then set up Lukaku, who got the winner, 11 minutes from time. Thanks for your company and see you again soon!
93'
Luton have one last throw of the dice, but there's an offside in there.
93'
Time's running out for the Hatters and Chelsea are defending easily.
92'
Luton get a free-kick here.
90'
The Luton fans want a penalty for handball, but the ref says no. Wasn't a pen. 3 added minutes.
89'
Kepa is injured after getting caught by Hylton.
87'
Time running out for the Hatters here.
85'
Luton are going hard looking for a leveller, but I think Chelsea will win now.
83'
Chelsea get a corner here.
80'
Luton get a corner, but it's cleared.
78'
Lukaku makes it 2-3!!! Good play by Chelsea sees the ball given to Werner and he squares for the Belgian to tap in!!!
Luton double sub: Campbell and Cameron Jerome on for Berry and Cornick.
61'
Chelsea double sub: Vale and Pulisic are on for Kenedy and Hudson-Odoi.
58'
Chelsea are trying, but they are creating little here.
54'
Corner for the Blues and Loftus-Cheek heads wide.
53'
Saul goes for the flick into the net and it goes over.
52'
Hudson-Odoi's centre is blocked behind for a corner.
51'
The rain is falling here now.
49'
Saul goes for goal rom distance and Isted catches.
48'
Rudiger crosses one in for Lukaku, but Luton head away.
48'
Chelsea attack and Luton force them back.
46'
Free-kick to Luton here.
46'
Luton get us going again!
45'
HT: Luton 2-1 Chelsea!! Half-time at Kenilworth Road in a thrilling cup tie. The hosts started brilliantly and took the lead after two minutes through Burke. Chelsea picked up after 15 minutes and Saul levelled in the 27th minute. The visitors then dominated and had several chances to score, but Cormick put Luton ahead again in the 40th minute. Luton lost Steer to injury, but the back up GK has been brilliant. Back shortly!
45'
45+5: Chelsea threaten through Saul and he wins a corner off the defender.
45'
45+2: Werner is down after getting caught in the face by Potts.
45'
45+2: Chelsea send a ball into the box and Luton get the ball away.
45'
Five extra minutes.
43'
Could we be in for a special night at Kenilworth Road??
41'
Totally against the run of play, Luton are 2-1 up.
Luton take the lead!!!!! The corner comes in and Burke's head goes in off the far post! What a start!
1'
Chelsea get us going in the blue from right to left while Luton are in orange!! Chelsea took the knee while Luton stood together on the edge of the centre-circle.
Start of match
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The players make their way out here!
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Luton make five alterations from the 1-0 win over Derby on Saturday. Naimsmith, Bree, Campbell, Lansbury and Adebayo are replaced by Potts, Mendes Gomes, Berry, Kioso and Muskwe.
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Chelsea make nine changes from the Carabao Cup final defeat on penalties to Liverpool on Sunday. Rudiger and Mount are the only players to remain in the XI.
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Luton are 6th in the Championship and in a play-off place. They are seven points off automatic promotion.
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We'll have extra-time and penalties if required.
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It's 5 degrees and raining in Luton for this one.
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Peter Bankes is the ref for this one and there is no VAR as it's not a Premier League ground. From the quarters, every game has VAR.
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Chelsea XI: Kepa (GK); Kenedy, Rudiger, Sarr, Hudson-Odoi; Saul, Jorginho, Loftus-Cheek: Mount; Werner and Lukaku.
The big news is that Roman Abramovich has revealed that he will sell Chelsea. The Russian says the sale will not be fast-tracked, he will not ask for any loans to be re-paid and all net proceeds from the sale will be given to help victims of the war in Ukraine.