Risky by Milan defender Theo Hernandez, who nudges over Kim Min-jae in the box. It was a shoulder barge so that's OK. But he had to get it right.

Now what does Frank Lampard do? Chelsea were hanging on before the red. They need to be perfect in their organisation and discipline now.

Chris Sutton
Former Chelsea striker on BBC Radio 5 Live

Ben Chilwell does pull Rodrygo's arm. He's running at great pace and goes down.

A red card is the right call.

Chelsea with 10 men are bang in trouble now.

Image source, Getty Images

David Alaba almost pours salt in the wound with a free-kick that flies past the wall but is saved by Kepa.

Ben Chilwell is off!

This is exactly what Chelsea didn't need. Rodrygo evades Marc Cucurella with a run to collect a ball over the top to get in on goal. Chilwell comes across and pulls him back on the edge of the box.

It's denying a clear goalscoring chance. It's a red.

Image source, Getty Images

Rodrygo passes when he should have shot.

The Brazilian has the ball 20 yards from goal but instead of pulling the trigger he plays a poor pass to Karim Benzema, who is tackled in the box.

Napoli's Piotr Zielinski has created more chances than any other player in the Champions League this season (23).

He has equalled Dries Mertens as the player with the most appearances for Napoli in the European Cup (34).

Chris Sutton
Former Chelsea striker on BBC Radio 5 Live

Chelsea are too lightweight up at the top. Joao Felix and Raheem Sterling have offered nothing in this second half.

Frank Lampard needs to make a change.

Now Raheem Sterling has the ball at his feet with space to run in to. He does just that until he reaches 35 yards from goal, at which point he has to turn and go back.

Image source, Getty Images

Too often the ball is fed to Joao Felix and he has nobody to help him. Through a lack of options he is forced to go alone, straight down blind alleys.

Napoli have started this half well, having been penned in for the end of the first half.

Mario Rui's corner is headed away.

Now Giovanni di Lorenzo's half-volley is blocked by Simon Kjaer. Another corner.

Kaustubh Joshi: Chelsea look world class from defense to midfield till close to the opposition half - and from there, they look like headless chickens. Going anywhere and everywhere except towards the opposition goal. Hurts.

Nicholas Walker: We saw what Man City can do in the 2nd half. I expect Real Madrid to stick the after burners on

A looping header from Napoli's false nine Eljif Elmas almost causes a major scare but Mike Maignan tips it over.

From Piotr Zielinski's corner, Giovanni di Lorenzo's header is straight at Maignan.

Marc Cucurella is the man on for Kalidou Koulibaly at the back for Chelsea.

Kalidou Koulibaly is down on the turf. He looks like he might have pulled something in that earlier chase with Rodrygo.

Image source, Getty Images

At some stage Napoli are going to need to bring on a striker. Italy international Giacomo Raspadori is on the bench.

Oof. Chelsea are flirting with disaster.

Eduardo Camavinga's chipped ball into the box is almost allowed to drop for Karim Benzema by Thiago Silva before the ball diverts into the grasp of Kepa.