Unsurprisingly, the opening exchanges are being played at a fast and furious pace. Real are enjoying a good spell of possession but are in no hurry to get forward.

Lee Dixon
Former Arsenal and England defender on BBC Radio 5 Live

Two-nil is one of those scorelines that it could be all over if Real Madrid get an early goal, but flip that on it's head and all those in blue will start believing.

Where those goals are going to come from is the big question.

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It's a great atmosphere at Estadio Diego Armando Maradona.

I don't think it's an exaggeration to say this is one of the biggest games in Napoli's history.

Victor Osimhen's return could be key to them today. He is absolutely unstoppable when he gets going.

Conor Gallagher is in the thick of the action early on and concedes a throw-in deep inside Real's half. Carlo Ancelotti is on the touchline furiously chewing gum. He loves these nights.

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Phil McNulty
BBC Sport chief football writer at Stamford Bridge

Chelsea fans trying to ramp up the atmosphere inside Stamford Bridge but it has not exactly been a place full of hope so far tonight as they try to chase down that first leg deficit.

Interim manager Frank Lampard needs the first win since his return tonight. And it needs to be a substantial one against the Champions League holders Real Madrid.

Great noise which Lampard will hope Chelsea can feed off.

Chelsea need the performance of the season. We're under way!

Has someone forgotten to put the Champions League theme on? The teams shake hands without the familiar music blaring out of the speakers. Ready for this? We're about to get going.

A warm embrace between Thiago Silva and Carlo Ancelotti in the tunnel and now the teams are coming out. Chelsea's biggest night of the season is here.

The teams are in the tunnel. They're about to emerge into a cauldron of noise. Stamford Bridge is bouncing.

Semra Hunter
La Liga TV presenter on BBC Radio 5 Live

I think Real Madrid feel very comfortable and Carlo Ancelotti ,after all the finals were drawn, rang his friends at AC Milan and said 'hey, see you in the final.'

Chelsea may have a surprise tonight for Real Madrid. Will it be enough to eliminate the men in white? I don't think so.

Madrid's players are hitting their stride and there are rarely games where they don't score. It's virtually a guarantee of goals and they will be feeling very good about their chances tonight.

Lee Dixon
Former Arsenal and England defender on BBC Radio 5 Live

I don't understand the thought process behind owners going into the dressing room. They're still getting to know the culture of football and in American sport it might be different.

They might take advice on whether they think it will go down well or not. English dressing rooms are different. It's a very, very different environment and that will not have gone down well.

What good does he think that's going to do, when he singles out a player?

BBC Radio 5 Live

Chelsea supporter Faye, speaking on BBC Radio 5 Live: "I'm going to be honest. I was very apprehensive of Todd Boehly.

"He's invested money but I personally don't like it. In my job I wouldn't like my manager micromanaging and telling me what to do or how to do my job when I'm qualified.

"He doesn't know what he's doing. He is an owner and fair enough he has owned businesses but this is football and it's completely different."

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Luke Edwards
Daily Telegraph writer on Football Daily podcast

Image source, Getty Images

What I would be worried about with Chelsea is it could get worse. I think the summer is going to be a problem for them with Financial Fair Play. They have got a bloated squad and they have created an unhappy working environment. There is no strategy and there is no plan.

This is only the seventh Champions League meeting between Italian teams... and AC Milan are unbeaten in them all.

Milan have played Juventus, Inter Milan and Napoli in Europe's top competition, and have never lost (winning three and drawing three). No other Serie A teams have ever played each other.

This is the first time Napoli have ever been this far in the European Cup. Milan were last at this stage in 2006–07, when they went all the way and won it.

Image source, Getty Images

Chelsea

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Will Faulks, Chelsea News:, external "It began almost as soon as the takeover was completed - Chelsea's new co-owners were pictured swaggering across the Stamford Bridge pitch, sunglasses on, laden with Megastore bags.

It continued through the summer as Todd Boehly and Behdad Eghbali gave speeches to a bemused group of players at their training camp in Los Angeles. It didn't stop once the season started either - there they were, front and centre and grinning widely, in every photoshoot with a new signing.

There was no hiding it. They had bought into football to try and make money, but also to parlay some of their vast existing fortune into a slice of fame. Like plenty of fund managers and business magnates before them, they sought to break free from the depths of the business section and find their way onto the back pages.

They have managed it - although we're not sure this was what they had envisaged. Saturday saw striking images of Boehly getting an earful from fans in the tier above his box.

Perhaps, in hindsight, keeping a low profile until the going was good would have been a more sound strategy than making themselves the stars of a show before its reviews were in.

Chris Sutton
Former Chelsea striker on BBC Radio 5 Live

Does it help the situation - an owner coming into the dressing room and letting off steam? I don't necessarily think it does.

What Todd Boehly has done is vent off a load of frustration and he has to have Frank Lampard's permission to do that otherwise he is undermining him.

Image source, PA

A Champions League quarter-final under the lights with the champions of Europe in town. Stamford Bridge ought to be bouncing but Chelsea are a mess.

Having gone through two managers this season, they've lost all three games under Frank Lampard, the new owners have come under fire and Chelsea face a big task to turn it around against Real Madrid.

Karim Benzema's tap-in - his 90th goal in the competition - gave Real boss Carlo Ancelotti the perfect start against his former club in the first leg last week.

The Spanish club struggled to add to their lead before Ben Chilwell was shown a straight red card for fouling Rodrygo.

Real scored what could be a decisive second goal when substitute Marco Asensio finished well after Chelsea were caught out following a short corner.

Chris Sutton
Former Chelsea striker on BBC Radio 5 Live

You do get owners who come into the dressing room when your team has won but in terms of footballing matters, I don't think it's a good idea to be going into the dressing room after a loss.