Alan Shearer
Ex-England striker on BBC One

This should be a cracker.

Chelsea are the best team in the Premier League by a mile and they have the league already sewn up in my opinion. A league and cup double in Conte's first season would be an incredible achievement. 

United have some way to go to get where they want to be, but with Mourinho they have a chance.

Phil Neville
Former Manchester United defender on BBC One

I think United will go with a back four and Phil Jones will go into midfield to look after Eden Hazard.

Paul Pogba will have a free role to go wherever he wants. You can't play a game like this without a centre-forward so it's a massive boost for them to have Marcus Rashford. 

Missed the Black Spartans wondergoal, Daisy discovering new team-mates and how Deportivo Lackovtalent got on?  

You can still catch up on all the amazing stories of the teams battling it out for five-a-side glory and a dream ticket to the FA Cup final.

Catch the FA People's Cup first-round highlights on the iPlayer. 

BBC One

Watch live at the top of the page, and on BBC One.

We are live from Stamford Bridge. 

Jose Mourinho catches up with Chelsea coach and former colleague Steve Holland at the Bridge.

Image source, PA

Manchester United

So what is that Manchester United line-up all about? Jose Mourinho won't tell BBC interviewer Dan Walker. The Portuguese boss is at his cagey best in the pre-match interview:

"I can't explain," he says when asked about his formation. "Just keep speaking in the studio, keep entertaining the people at home. See the game and after a couple of minutes you will understand."

"Will Phil Jones play in midfield?" asks our man Dan. "I can't tell you," is Mourinho's reply.

Watford

What's going on here then?

This week Watford captain Troy Deeney hitches a lift to work with comedian, aspiring goalkeeper and choirboy Lloyd Griffith.  

Obviously. 

BBC One

Wherever you are tonight - sitting down for post-work dinner, on your way to an evening class, settling in for a night shift - the BBC has you covered.

As well as following these wise words, you can also watch and/or listen to the action from Stamford Bridge.

The TV coverage starts at 19:30 GMT on BBC One (and online), with presenter Gary Lineker joined by Chelsea legend Frank Lampard and former Manchester United defender Phil Neville. Ex-England striker Alan Shearer is also in the studio to offer a neutral's perspective.

Over on BBC Radio 5 live (which you can also hear by clicking the 'Live Coverage' tab on this page), former England midfielder Jermaine Jenas joins commentator Ian Dennis.

Chelsea v Manchester United? In the FA Cup quarter-finals? At Stamford Bridge? It is like going back to 1950.

And the Blues are marking the occasion with a retro programme cover. Costs a tad more than a sixpence though.

Craig Thomas: Jones to play RB, Valencia on the RW with Henrikh Mkh at 10! Trying to exploit the wide areas

Kyle: 3-4-3 for Man United. With Henrikh, Young and Rashford in attack. Do not write them off. Still a class side 

Adam Jones: Am I the only one who sees that Man Utd line up as a 3-4-3 to match up with Chelsea? 

Chelsea

Chelsea manager Antonio Conte on his side's ambitions this season:  "We are able to play game by game and our expectation is try to take three points to win a league game and also to go through in this competition."

On what his side's success is down to : "You look at the stats and we have the best defence but we also have the second best attack in the league behind Liverpool who have played a game more."

Our chief football writer Phil McNulty has got his binoculars trained on one Manchester United player in particular during the pre-match warm-ups...

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It's 10 years since these two sides met in the first FA Cup final at the new Wembley - Didier Drogba poked in the only goal in a poor game.

Has there been a better 'big-game' player than Drogba? The man loved a final. 

Image source, Getty Images

Of course, Manchester United can trump any double chat at any time with their treble achievements of 1999.

And after winning that last double in 2010 Carlo Ancelotti was sacked a year later. After finishing second.

So maybe don't get too excited Antonio...

Image source, Getty Images

The Red Devils have scored just three times in their last nine clashes with Chelsea, and never more than once in any of those games.

Marcus Rashford had better be fit. 

Manchester United

Manchester United manager Jose Mourinho: "We know it is a difficult match for us. We know our opposition is at the maximum of their potential, every player is fresh and ready and they are showing us respect by playing their best team."

On his selection problems: "We are tired, we miss lot of players, we have a big match on Thursday, we are afraid of extra-time, but we want to win."

On Marcus Rashford overcoming illness:  "The decision has come from him. He understands the situation, he is the only one forward with a chance to play. He put himself on the line and he plays. Let's see how he goes."

We've all done it.

When packing for a little trip away - maybe a hop to Europe for a city break, a weekend at a mate's or even just a mundane journey to see family - you always manage to leave something at home.

Image source, Getty Images

It's usually a phone charger in my case. That or a toothbrush.

Jose Mourinho got off the train to London on Sunday night without his entire forward line.

So it's a good job that Marcus Rashford made himself available this afternoon and popped down.

Chelsea make two changes from the team that won at West Ham. Nemanja Matic is in for Cesc Fabregas, Willian for Pedro. Both players to drop out are on the bench.

Chelsea:  Courtois, Azpilicueta, Luiz, Cahill, Moses, Kante, Matic, Alonso, Willian, Costa, Hazard.  Subs : Begovic, Fabregas, Zouma, Pedro, Batshuayi, Terry, Chalobah

Image source, .

Marcus Rashford starts for Manchester United , despite suggestions that he would be too ill to do so. He is one of four changes from the side that drew 1-1 at Rostov in the Europa League on Thursday. David de Gea is back in goal, while Matteo Darmian and Antonio Valencia return for Marouane Fellaini and Daley Blind.

This is our best guess on the formation...

Man Utd : de Gea, Jones, Smalling, Rojo, Valencia, Ander Herrera, Pogba, Darmian, Mkhitaryan, Rashford, Young.  Subs : Bailly, Mata, Lingard, Carrick, Blind, Romero, Fellaini.  

Image source, .

Phil McNulty
BBC Sport chief football writer at Stamford Bridge

Jose Mourinho was humiliated on his return to Chelsea as Manchester United manager in October as Antonio Conte's side handed out a 4-0 thrashing.

Mourinho never forgets such moments so it will be interesting to see his approach to tonight's FA Cup quarter-final here in west London.

He is without the injured Anthony Martial and Wayne Rooney, while Zlatan Ibrahimovic starts a three-match ban for elbowing Bournemouth's Tyrone Mings.

It has placed a huge weight of responsibility on Marcus Rashford, who has apparently risen from his sick bed to start.