Sheffield United old boy Harry Maguire blocks Enda Stevens' close range strike to keep the game scoreless.

David Marshall then saves well from Pedro to keep the score at 1-0. Willian the creator of the opportunity. He's running the show.

Chelsea have a free-kick on the left side of the box. It's a horrible angle for a shot but Willian fancies his chances anyway. He does force David Marshall into a diving save to be fair to him but then the referee blows for an infringement.

Demarai Gray pops a first-time effort into the sidenetting as Leicester come forward again.

Riyad Mahrez was involved in the build up to the chance. He's been very lively so far, certainly getting his head down and getting on with the job.

Image source, Getty Images

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

Dicko up top has enough pace to beat any of this Chelsea back three. If they get him running into those channels, he definitely has the beating of them for pace.

Curtis Davies
Derby defender on BBC Radio 5 live sports extra

Another good save. It comes on to Vardy's left, which is not his favourite side but he should score. The goalkeeper stood up well. He made himself big. If he goes down early he gives Vardy a chance to lift the ball over him.

Riyad Mahrez and Jamie Vardy link up, the former sending his team-mate clear but Jamal Blackman is off his line quickly to block the England striker's shot.

Image source, Reuters

Martyn Lee: Let's lull them in to a false sense of security. #comeonhull #tigertiger #bbcfacup @HullCity #comebackison

A cheeky back heel by Willian sends Danny Drinkwater away on the left side of the box. The midfielder crosses low across the face of goal but again it is just out of Olivier Giroud's reach at the far post.

The former Arsenal striker could easily have had at least two goals by now.

Crucial block by Sheffield United old boy Harry Maguire as he gets in the way of Enda Stevens' close-range strike.

Image source, Reuters

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

"All these Chelsea players have genuine ability and it will be a tough evening for Hull. But, I think they have settled down a bit since the goal, but it is whether they can get the ball forward."

Willian is enjoying himself out there now, producing neat flicks and tricks as Hull struggle to get near him.

Watch as he curled Chelsea in front, after just two minutes.

So far so good for Sheffield United with the Championship side doing a decent job of frustrating their Premier League opponents. Jamie Vardy's curled effort is the closest the home side has come to scoring with half an hour gone.

Olivier Giroud screams in frustration as he goes close to bagging his first goal for Chelsea.

Pedro clips the ball over the defence, Giroud is just onside but flicks a volley just over.

Image source, Reuters

A chance for Hull - their first of the game - as Jackson Irvine pops a header over the bar from Kevin Stewart's cross.

It wasn't anything to truly worry Willy Caballero in the Chelsea goal but will give the Hull players belief they can create opportunities.

Bit of a scramble inside the Leicester box following a Sheffield United corner. Former Blade Harry Maguire is eventually able to hack clear.

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

"Sprinting into the box is not Giroud’s forte, that was a great opportunity if he could have found another gear from somewhere."

Image source, AFP

JP: Listening to Blades- watching Kent vs USA in the West Indies 50 over regional cup. Perfect evening.

Almost a second for Chelsea as Cesc Fabregas plays a corner short to Willian. The winger clips a smart ball for Fabregas, who has crept into the area, but his shot at the near post is pushed behind by David Marshall.

Willian then gets another cross in but it is just out of reach of Olivier Giroud.

Willian is running the show at the moment.

Image source, Reuters