Tom Scott: This game is set up perfectly for Branko Strupar to be the Derby hero from the bench

Former striker Strupar is 46 and spent four years at the Rams, between 1999 and 2003

Wilfried Ndidi could be Leicester's newest hero. He almost gets on the end of the corner, but Derby survive.

Kevin Kilbane
Former Everton winger on BBC Radio 5 live

That was an excellent initial run from Riyad Mahrez. It was the movement in front that allowed Andy King to get his shot away.

Andy King drives his Leicester team forward, having a pop from distance. Derby keeper Jonathan Mitchell - who shouldn't be on the field remember - pushes out for a corner.

Image source, Reuters

Leicester win back the ball and start pinging it about with ease. Derby chasing shadows. The home fans start to enjoy some 'Ole!' football. 

James Stevenson: The pundits saying the two ET Leicester subs have a made a difference. You should hope so - They cost about £45m!  

Derby enjoying plenty of possession in these early moments after the restart. Can't do much with it though. They seem to be running out of juice.

I'm reliably informed that #YesNdidi is trending on Twitter. If I could use a 'clapping' emoji to salute Leicester's social media team now then I would.

Image source, Rex Features

Fifteen minutes between Leicester and a trip to deepest, darkest Bermondsey. Derby kick off what they hope can be a fightback.

Alan Shearer
Ex-England captain on BBC One

That was much better from Leicester. They got a very good goal from Ndidi. They should have got a penalty and should have scored another.

Missed Wilfried Ndidi's screamer? No problem...

Jacob Butterfield's corner is met by a Leicester head. Danger over for the home side. Well, for a minute or two anyway. Time for the oranges.

Image source, PA

Clock ticking on the first period of extra-time. Derby have a corner...

Some signs of hope for Derby. Little Johnny Russell is allowed to meet a right-wing cross with his head, but he doesn't make enough contact and the glancing header whizzes well wide.

Kevin Kilbane
Former Everton winger on BBC Radio 5 live

That is a tap-in. Three yards out from goal. Demarai Gray knows he's created a glaring opportunity for Islam Slimani.

Image source, Reuters

Should be 3-1. How isn't it 3-1? Demarai Gray leaves Richard Keogh's head spinning with his mazy run on the left, clipping in a cross that Islam Slimani only has to tap in. But the Algeria striker gets his feet tangled worse than a drunk on a dancefloor, completely missing the ball. 

All Leicester now. The Foxes sniffing blood...

Leicester striker Islam Slimani asks for a penalty when he tangles with Derby skipper Richard Keogh. You'll have to do better than that young man. Referee Mike Jones dishes out Christmas presents more often than penalties on tonight's evidence.

Now that's how you score your first goal in English football...