Harry Wilson, who injured his shoulder when he was knocked off the ball by Cesc Fabregas for the Hull penalty, is replaced Jon Toral.

Curtis Davies
Derby defender on BBC Radio 5 live sports extra

"United will have throw forward some more men to support Donaldson, because he's been on his own for most of the night."

With the crowd in full voice, Leicester are pushing for a second as Jamal Blackman touches a Demarai Gray shot behind.

Curtis Davies
Derby defender on BBC Radio 5 live

There’s a mini inquest between the United players as to who should have picked up Mahrez. It’s the one time Vardy has managed to get away on his own, to get a header that goes over into the back of the net.

David Meyler hits it at a nice height for Willy Caballero and the Chelsea keeper saves the penalty.

Opportunity missed by Hull.

Image source, Reuters

Cesc Fabregas brings down Harry Wilson inside the box and Hull have the chance to get one back...

Image source, Reuters

And it's back under way.

The last time these two sides met in the FA Cup, Chelsea won 6-1.

Could they...?

The game as good as won, Antonio Conte decides to give one of the club's youngsters a run out. Seventeen year old winger Callum Hudson-Odoi is on for Pedro.

Image source, AFP

Curtis Davies
Derby defender on BBC Radio 5 live sports extra

He is a man mountain, Harry Maguire, but he is also very quick. He did really well there to stand his ground, force Brooks into a decision and then use his strength to ease him off the ball.

Promising run by David Brooks as Sheffield United break. He only has Harry Maguire to beat but the Leicester defender uses his strength to shrug the forward off the ball. Good defending.

"Shooooot" shout the Leicester fans as Demarai Gray tees up Wilfred Ndidi on the edge of the area. Ndidi does indeedy shoot, but sprays the ball wide.

Image source, Getty Images

Riyad Mahrez glides his way through the Sheffield United midfield and into the box. It looks like he's going to go all the way until someone gets an important foot in at the last second.

Harry from Bedfordshire: Comfortable win for Chelsea before a big Tuesday night. Get the young lads on Antonio!

Mark, Northampton: Get Sterling, Hudson-Odoi and Challobah mk2 on for the entire 2nd half now. Not often you get that chance so take advantage when you can.

So, you've got less than three days to get involved with the country's most inclusive and free five-a-side competition - the FA People's Cup.

Don't worry, we'll show you how to sign up.........

If you want to know more and head straight to the sign-up link - just head here.

But don't leave it too late - the deadline to sign up is midnight THIS Sunday, 18 February.

See you out there hopefully!

Good start to the second half by Sheffield United as they win a couple of corners in quick succession.

Daniel Lafferty swings the latest one in and it causes a few nervous moments for the hosts in defence before Jamie Vardy acrobatically hooks away.

Olivier Giroud has his first goal in a Chelsea shirt, as he puts them 4-0 up.

Jermaine Jenas
Former Tottenham midfielder at Stamford Bridge on BBC 5 live

Chelsea have been absolutely brilliant, started the game just right, and approached it in the right manner. It’s been impossible for Hull to stop, Chelsea have cut them open down the flanks and in the middle.

"Hull are in damage limitation territory. Someone has to get on Fabregas - he is having the time of his life. Mentally they have to almost write this one off, and stay positive for the rest of the season.

A concern for Sheffield United boss Chris Wilder as Clayton Donaldson picks up a knock. He limps to the touchline but is able to jog it off and carry on.

Image source, Getty Images

Martyn Lee: I'd take a draw and a replay at this point. #loadsoftime #comeonyouhull #bbcfacup @HCAFC #notovertilitsover

Positive thinking there, Martyn...