Martin Keown
Former Arsenal defender on BBC One

Diego Costa has been a different animal this season. He just gets on with scoring goals and winning games now.

Marcos Rojo loops a header over the top from that corner. It looks like Phil Jones is going to attempt to mark Eden Hazard out of the game. Good luck with that.

*not all entries tonight will feature Phil Jones

Jermaine Jenas
Former England midfielder on 5 live

I'm expecting it to be a cagey affair. No-one will come flying out of the traps, with both managers trying to play on the counter attack. It will be one for the purists, a great tactical battle.

Martin Keown
Former Arsenal defender on BBC One

The most expensive player in world football... Is tonight the night that Paul Pogba comes good?

Phil Jones is playing in midfield for Manchester United, who win an very early corner.

Diego Costa gets the ball rolling and we are off!

David de Gea and Thibaut Courtois are both playing their first FA Cup matches of the season. Big game, big names. 

Connor Eccott:  Time for Pogba to disappear for another 90 minutes of a big game...

Jose Mourinho embraces John Terry near the tunnel, who gives him a 'hello boss!"

Like POTUS, 'boss' is a tag which doesn't get lost when you move on.

Jermaine Jenas
Former England midfielder on BBC Radio 5 live

I love what N'Golo Kante has brought to the table and people say David Luiz is playing well because of what he brings. But no-one expected to see that type of David Luiz this season.

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

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

Referee : Michael Oliver (Northumberland)

Here we go then, dimmed floodlights, spotlights on...

BBC football analyst Pat Nevin investigates whether Chelsea have a "weakness" which Manchester United could exploit tonight.

Alan Shearer
Ex-England striker on BBC One

If Manchester United are going to get through they will have to rely on Marcus Rashford's pace. 

They will sit deep and try to utilise his pace.

When he has been involved - which is not enough from his point of view - he has scored seven goals, three in the league, and the vast majority of his play is getting in behind.

Once he gets into that position not many are going to catch him. It is just whether he can finish it off.

Andy Hoops: Blocked the term "park the bus" on my timeline

Alex Jeffs: Can't shake the feeling there's going to be some classic 19th century football from Mourinho today. 6 defenders in the lineup!

Kevan Pettitt : I don't understand why Mata, our most creative player, is on the bench?

Frank Lampard
Former England midfielder on BBC One

Eden Hazard has been incredible. I was lucky enough to play with him myself. Top players do great things at top pace. More than anything, this year it is his position, closer to Diego Costa.

Now he is more central he can score goals and make assists to a greater level and become one of the best players in the world.

Image source, Getty Images

A reminder that the draw for the FA Cup semi-finals will take place at Stamford Bridge after tonight's game.

The match and draw will both be live on BBC One and in this page.

Five of the Premier League's top six teams are left in the competition, after  Arsenal beat non-league Lincoln City  and  Tottenham ousted Millwall.

Those five clubs have won the FA Cup a combined 44 times, including 12 of the past 15.

The draw will be hosted by BT Sport's Jake Humphrey and made by FA Cup winners Ruud Gullit, a former Chelsea player and manager, and Phil Neville, the ex-Manchester United defender.

Both semi-finals will be played at Wembley on the weekend of 22 and 23 April.

Alan Shearer
Ex-England striker on BBC One

Zlatan Ibrahimovic has had one hell of a season but the rest have struggled. It is not for a lack of creating chances, they have just not put chances away. Yes, they give away a few chances but they are creating plenty.

Image source, Getty Images

Chelsea are unbeaten in their last 11 meetings with Manchester United in all competitions (W6 D5), last losing to them 3-2 in October 2012.

Frank Lampard
Former England midfielder on BBC One

From early season, Chelsea changed after a big loss at Arsenal and went to three at the back. They keep churning out the same performances and results now. They have togetherness, they defend and attack as a team. They have special players who can win games.