Man Utd drawn to face Tottenham in semis, Chelsea v Southampton
Morata with opener for Chelsea, Vardy equalises for Leicester
Sub Pedro heads winner in first half of extra-time
Hojbjerg & Cedric score as Southampton beat Wigan
Leicester 1-2 Chelsea
Ian Wright
Former Arsenal & England striker on BBC Radio 5 live
I feel for Leicester. They really stepped it up in the second half. Apart from the mistake from Kasper Schmeichel it was 'even-stevens.' I thought Chelsea were running out of steam at the end.
Leicester 1-2 Chelsea
Phil Brown
Swindon Town manager on BBC Radio 5 live
Chelsea's quality just shone through in final third to put them through.
Leicester didn't deserve to go out a draw was a good result, but they just didn't do enough to win the tie I'm afraid.
Leicester 1-2 Chelsea
Danny Murphy
Former England midfielder on BBC One
It was a really good game and it got going properly in the second half. I thoroughly enjoyed it.
Leicester 1-2 Chelsea
The goal that sent sent Chelsea into the FA Cup semi-final.
Pedro scores in the first half of extra-time, to put Chelsea ahead at the King Power.
Leicester City 1-2 Chelsea
Chelsea are heading to Wembley thanks to Pedro's header in extra time.
Leicester City 1-2 Chelsea
One minute added on at the end of extra time.
Leicester 1-2 Chelsea
Danny Murphy
Former England midfielder on BBC One
It has been a spirited performance by both teams but especially Chelsea. They have shown some good character.
Leicester City 1-2 Chelsea
Olivier Giroud is down after copping a blow to the face.
The Leicester players huddle round in animated fashion, presumably concerned about possible damage to that area of outstanding natural beauty.
Right, he is up and ready to continue.
Leicester City 1-2 Chelsea
Adrien Silva slashes a shot into a defender's shin as Leicester break forward at pace.
Leicester 1-2 Chelsea
Phil Brown
Swindon Town manager on BBC Radio 5 live
People talk about Eden Hazard and his ability going forward, but he's just won a header in the left-back area. He has shown a great attitude. he wants to win today.
Image source, ReutersLeicester City 1-2 Chelsea
Chelsea seeing out the time, soaking up the seconds.
#bbcfacup or 81111 on text
Tom: Honestly, since Morata's goal, this has been one of the most exciting games I've watched as a neutral.
Leicester City 1-2 Chelsea
And the last roll of the dice from Claude Puel.
Demarai Gray on in place of Marc Albrighton.
Leicester 1-2 Chelsea
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Leicester City 1-2 Chelsea
Chelsea win a corner through some canny play from Olivier Giroud.
His team-mates go into slow motion as they prepare to take it.
Seven minutes to Wembley.
Leicester City 1-2 Chelsea
Chelsea are threatening a knockout blow on the break.
Marc Albrighton gets in a superb courageous block to turn away N'Golo Kante's effort.
Leicester 1-2 Chelsea
Danny Murphy
Former England midfielder on BBC One
A bit more composure from Harry Maguire was needed.
#bbcfacup or 81111 on text
Josh: Kasper handing the game to Chelsea.
Ricky: That is a absolute howler from Schmeichel there, gifted a goal what a shocking decision.
Lee: Pedro scores but what a pass from Kante!!
Leicester City 1-2 Chelsea
That has set the tone.
Leicester pack the Chelsea box and Harry Maguire drills the ball across the face.
Jamie Vardy has a nibble, Riyad Mahrez has a shot blocked and Fousseni Diabate swipes at the loose ball.
None can find the net though.
And Mahrez's appeal for a handball against Cahill are turned down.
This is going to be manic.
Leicester City 1-2 Chelsea
Back under way.