Former Barcelona and Stoke player Bojan Krkic chimes in with his favourite Chelsea v Barcelona moment.

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Barcelona look happy to let Chelsea have the ball in wide positions - without a big man in the middle to aim crosses at.

They are less happy about that!

Eden Hazard darts in off the right flank onto his favoured left peg and lets rip with a rocket that sizzles just past the apex of Marc Andre ter Stegen's top corner.

Warning shot fired.

Image source, Getty Images

Lionel Messi gets the ball from a loose bit of Chelsea build-up play and stutters towards Cesar Azpilicueta on the edge of the box, all dipping shoulders and feinting feet.

But the Chelsea skipper slides in with a perfect tackle to nick the ball off his toe.

Andy Townsend
Ex-Republic of Ireland international on BBC Radio 5 live

Looking forward to seeing how home side attack this. There needs to be an element of caution against a team like Barcelona, but be positive when you get the opportunity.

It’s a fantastic contest in prospect.

Barcelona - playing in a Roma-style shade of copper red - are enjoying plenty of possession.

Paulinho is taking up a position on the right side with Sergio Busquets and Ivan Rakitic bossing the centre of the pitch.

Chelsea get us underway...

Image source, AFP

James: If Chelsea win this game, I'll burn my Messi shirt that I own because I am confident of a brace or hat trick from the star man.

Sean: I want to have faith but I can see Barca putting 4 past us tonight! We haven't exactly set the world alight recently, and Barcelona are not exactly a West Brom or a Hull....

Oliver: Don't understand why I am expected to want other English teams to do well in the Champions League. I cannot wait to see Chelsea get absolutely tonked tonight

The Shed End have a banner to greet the two sets of player, complete with promise to keep the blue flag flying high.

Cuneyt Cakir - the Turkish referee who sent off John Terry in the teams' 2012 semi-final meeting - has drawn the shortest straw at Uefa headquarters and is on the whistle.

Stamford Bridge is a'flutter with blue flags and Blue Is The Colour blasting out of the tannoy.

There is a feisty travelling contingent in the house as well.

All pretty matey in the tunnel as Barcelona duo Sergio Busquets and Andres Iniesta slap palms and exchange pleasantries with Chelsea skipper and Spain team-mate Cesar Azpilicueta.

And they are on their way...

John: We conceded 6 goals against Roma with Fabregas in a 2 man midfield so only logical to do it against Barcelona.

Dilino: When was the last time Chelsea won a match with a false 9? Oh, I just remember Conte is not out to win tonight.

Image source, Rex

Barcelona striker Luis Suarez has failed to score in the last 791 minutes of play in the Champions League, his longest drought in the competition.

Of course, he has his own personal history with Chelsea.

Image source, Getty

James: My memory of Torres scoring in the 2012 semi final. I literally cheered at the top of my lungs when we went through to the final. Got detention because I was in class but it was worth it.

Sreekanth: Chelsea-Barca 2009, At my apartment in the middle east. Changed job one time, married, bought a car, resigned from job, joined master's course in Germany

Graham Hunter
La Liga journalist on BBC Radio 5 live

Image source, Rex

I think when you look at any high-performing club, one where standards are demanding, where everyone’s on their back, every movement, every gesture, the results, the performances are under microscope – if there’s a breakdown between the top of the club and the manager, the players notice.

Footballers look at the coach and they look for absolute concentration and absolute intensity. And if any group of players notice that the owners of a club and the manager are likely going to divorce, people start to take their eye off the ball.

It feels like the misunderstanding between Conte and the board means that the Chelsea players have started to think about the World Cup coming up, transfer market rather than being absolutely intensely focused on day by day training.

James Horncastle
European football writer on Euro Leagues Football Show

Image source, Getty Images

There’s hope for Chelsea. When you have a manager like Antonio Conte, you have someone who can level out the playing field or even tilt it in his side’s favour with that tactical nous he’s got. We’ve seen him upset the odds before, at the Euros for example when Italy played Spain. So I would trust in his ability to find one or two weaknesses in this Barcelona side.

They’ve come a long way, but if you look at their away performances in the Champions League in the group stages, they drew away at Juventus, drew away at Olympiakos and only won at Sporting Lisbon because of an own goal.

Samuel: This could be another Conte masterstroke. Ambitious line up. The last thing Valverde would be expecting.

James: Our best keeper, best defence, best midfield... but no striker in a game we need to win?! Has Conte never watched Barca before?

Image source, Rex Features

In the build-up to this match, Tom Henning Ovrebo - the referee who so enraged Chelsea by turning down a clutch of penalty appeals in the 2009 semi-final second leg - has admitted that he got some of those fateful calls wrong.

"It was not my best day really," the Norwegian told Marca., external

"Some days you are not at the level you should be. I can't be proud of that performance."

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Bayern Munich manager Jupp Heynckes has left experienced duo Franck Ribery and Arjen Robben on the bench tonight.

They are replaced by skipper Thomas Muller and left-back David Alaba, who were both among the substitutes for Saturday's 2-1 win at Wolfsburg.

Bayern Munich: Ulreich, Hummels, Boateng, Alaba, Kimmich, Martínez, Vidal, Rodríguez Müller(c), Lewandowski, Coman.

Subs: Wagner, Süle, Starke, Robben, Tolisso, Rafinh, Ribéry.

Image source, BBC Sport

Meanwhile Besiktas coach Senol Gunes has made one change from the team that drew 1-1 with Konyaspor in Super-Lig last Friday.

Defender Domagoj Vida comes in for Dutch midfielder Jeremain Lens, who drops to the bench.

Beskitas: Fabri, Adriano, Erkin, Vida, Pepe, Hutchinson(c), Medel, Quaresma, Talisca, Babel, Love

Subs: Tosic, Lens, Zengin, Negredo, Gönül, Arslan, Ozyakup.

Image source, BBC Sport

Phil McNulty
BBC Sport chief football writer at Stamford Bridge

Image source, Getty Images

Chelsea's David Luiz - not involved here tonight - walks past Barcelona's fans with his trademark curly mop of hair hidden under a woollen hat - but there is no escape as he is quickly spotted and given a resounding chorus of jeers.

Image source, Getty

How to stop the Blaugrana juggernaut?

With difficulty in short.

Spanish football writer Andy West has had a hunt for Barca's blindspots for the BBC Sport website.

In short Thibaut Courtois needs to maintain his hex on Lionel Messi and the Blues will have to hope that Samuel Umtiti falls short of the impeccable standards that he has set so far this season.

Read in here.