Sandy Baltimore has probably been Chelsea's busiest player during these first 33 minutes. You can't fault her energy.

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Karen Bardsley
Former England and Manchester City goalkeeper on BBC Radio 5 Sports Extra

That has absolutely deflated the ground. The energy has gone right out of the stands.

What a fantastic run by Bonmati in the half space. She forces a challenge from Charles but it's absolutely nowhere near.

The composure to absolutely smash it between the hands of Hannah Hampton when you expect it to go across goal is the clever speed of thought from the Ballon d'Or winner.

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Chelsea respond to going behind by winning a couple of corners.

From the second, Sandy Baltimore shoots from distance but her low shot is easily saved by Cata Coll.

More Chelsea pressure comes to nothing.

Neil Johnston
BBC Sport at Stamford Bridge

And that's why Aitana Bonmatí is one of the very best.

The Barcelona bench erupted when her ferocious finish hit the back of the net.

One of the Barca coaches called Cata Coll over to deliver some instructions during the celebrations.

Has he told the goalkeeper to slow things down?

Karen Bardsley
Former England and Manchester City goalkeeper on BBC Radio 5 Sports Extra

Chelsea still look like their tails are up and they look very confident. Erin Cuthbert is having an absolute field day in the middle of the park.

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Cata Coll is finally called into action and she comes up with a big save to deny Sjoeke Nusken from close range.

A few moments earlier, Sandy Baltimore also had a good chance after being picked out by Mayra Ramirez.

Chelsea are knocking on the door.

Chelsea's Mayra Ramirez is penalised for a foul in Barcelona's box.

There's been plenty of physicality from both sides.

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Twenty minutes in and while Chelsea have enjoyed plenty of possession, they're yet to find any quality with their final ball.

Barcelona send a long ball forward towards Ewa Pajor but goalkeeper Hannah Hampton reads it well and quickly comes out of her box to snuff out the danger.

Neil Johnston
BBC Sport at Stamford Bridge

Sonia Bompastor called Erin Cuthbert and Sandy Baltimore over to her while there was a brief stoppage after a Barcelona player went down.

The fast start the Chelsea boss was hoping for hasn't happened.

Bompastor has also been spoken to by the fourth official after straying out of her technical area.

Oh dear. Brain fade from Lucy Bronze.

She goes to pass the ball back to goalkeeper Hannah Hampton but they're not on the same page and it goes out for a corner.

Fortunately for Bronze, the corner comes to nothing.

Chelsea's Erin Cuthbert, deep in her own half, tries an ambitious pass up towards the halfway line but it goes nowhere near a player in blue.

They're inviting Barcelona to attack.

Image source, Getty Images

Karen Bardsley
Former England and Manchester City goalkeeper on BBC Radio 5 Sports Extra

This is so much better from Millie Bright. She is really stating her authority by stepping into midfield which allows the midfield to get higher and allows pressure to be sustained on Barcelona's back line, keeping them pinned in

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Another positive spell of possession for Chelsea in Barcelona's half but they're yet to threaten Cata Coll's goal.

Lovely trickery from Sjoeke Nusken on the touchline to swivel away from Ona Batlle.

She picks out Sandy Baltimore but she misplaces her attempt to thread to the ball into the box for Mayra Ramirez.

Chelsea can't afford that kind of inaccuracy in the final third.

A couple of times already Barcelona have delivered pinpoint long passes from defence to unleash players down the left wing.

The second of these marauds forward ends with Fridolina Rolfo upending defender Lucy Bronze in Chelsea's box.

Image source, PA Media

Karen Bardsley
Former England and Manchester City goalkeeper on BBC Radio 5 Sports Extra

It's a lively start for Chelsea, but Barcelona just look so comfortable, calm and in control. They just kill any Chelsea enthusiasm as soon as they gain possession.

Neil Johnston
BBC Sport at Stamford Bridge

Barcelona are so easy on the eye. Their passing, the slickness, the calmness in tight situations. There is so much to admire about this team. And they've started on the front foot. No evidence at all in these opening minutes they've come to Stamford Bridge to defend their first leg advantage.