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

He got the ball to feet and then just had one little move to his right. Chalobah couldn't get the block in. Kepa probably would have had it covered, but that's what you've got to be aware of. They're so sharp up front when they get into the box.

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This is so intense. Eder Militao picks up the game's first booking after going in hard on Kai Havertz. More importantly it gives Chelsea a free-kick in a decent position.

The crowd go wild as Olivier Giroud steps up and sees his penalty saved by Alex Meret. It was centre right. Good save.

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Wow. Very little threat from Real so far and then Rodrygo creates some space for himself inside the box and thumps an effort against the outside of the post. Kepa wasn't getting to that if it had been on target.

Well now.

As Milan striker Rafael Leao tries to pass to a team-mate, Mario Rui catches him with a late tackle and the referee points to the spot.

Phil McNulty
BBC Sport chief football writer at Stamford Bridge

This is good start from Chelsea. Plenty of energy and intensity and the home support responding accordingly. Will they regret that miss by N'Golo Kante? You simply have to take those chances when the margins will be as tight as they are tonight.

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Listen to that noise!

Marc Cucurella wins a corner and Reece James pings it into the box but it's smashed away by Eder Militao.

Chelsea have started on the front foot while Kepa Arrizabalaga has had little to do so far.

Alex Howell
Football reporter at Stamford Bridge

Frank Lampard had his head in his hands after N’golo Kante missed that early chance for Chelsea. It’s given the crowd a lift in Stamford Bridge though.

Reece James is seeing a lot of the ball out wide inside Real's half but Vinicius Junior is doing a decent marking job on the Chelsea player.

Napoli's Matteo Politano, preferred to Hirving Lozano on the right wing today, cuts in and hits a stanchion with his shot.

Milan's first attack sees Sandro Tonali's inswinging cross caught by Alex Meret.

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

He's played a little bit higher up and he is going to get opportunities into the box.

He's 12 yards out, the goal gaping and he's snapped it into the crowd.

A huge opportunity.

Chelsea need an early goal and they so nearly got one there. N'Golo Kante will be disappointed he didn't at least test Thibaut Courtois.

Good intensity from the home team.

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It's all Napoli so far. This is much more like it compared to the first leg. Victor Osimhen gets a glancing header to a cross but it's too much glance and not enough head,

Milan are hanging on somewhat.

Luka Modric under-hits a pass and Chelsea are almost in. That's got Chelsea's fans out of their seats. Then a HUGE chance. N'Golo Kante is free inside the box as the ball lands at his feet but he pulls it wide.

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Real are getting into their stride. A lovely ball by Eder Militao finds Vinicius Junior, who cuts in and tries to pick out Karim Benzema at the far post.

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Napoli winger Khvicha Kvaratskhelia, whose goals have dried up a bit in the past few weeks, cuts in from the left and hammers in a shot saved by Mike Maignan.

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

What it will do with playing that formation is Kante can get a little bit closer to Kroos.

They've already given them something to think about. Conor Gallagher has pushed into that number 10 position.

When you get the opposition thinking about what you're doing you've done half a job.

Play is stopped after Karim Benzema is hurt. He scored a hat-trick at Stamford Bridge last season. Benzema has hurt his foot but is able to continue.

Napoli's first chance of the game. Mario Rui has a go with a free-kick from almost 30 yards out which hits a head in the wall and goes out for a corner.

Simon Kjaer heads this one behind for another corner.

And then Tanguy Ndombele wins a third corner. Good pressure from Napoli.

Olivier Giroud heads this one away.