Charlie Adam
Former Liverpool midfielder on BBC Radio 5 Live

I think Alexander Isak has 20 minutes in him or half-an-hour maximum.

Steven Gerrard
Former England and Liverpool captain on TNT Sports

I think Liverpool's performance was relatively OK first half, they need to be braver, bolder and back themselves a little bit more.

Back under way in Paris.

Image source, Reuters

Elizabeth Conway
BBC Sport Spanish football reporter at Camp Nou stadium

Atleti's goal was completely against the run of play but ultimately, they were able to find the back of the net.

Barca are doing all the hard work but have simply been unable to convert their chances. Their final touch must improve in this second-half.

Paul Robinson
Former England goalkeeper on BBC Radio 5 Live at Parc des Princes

Liverpool are still in this game and PSG are not out of sight. Liverpool have got Giorgi Mamardashvili to thank for that. PSG have got so much quality in the wide areas and they always look a threat.

Image source, Getty Images

Image source, Reuters

That's it for the first half.

Barcelona did everything right but score, and were sorely punished when Pau Cubarsi saw red and Julian Alvarez scored from the resulting free-kick.

Robert Lewandowski receives the ball inside the box and turns, but his low shot is deflected and easily gathered by Juan Musso.

There's the whistle.

Liverpool will feel disappointed to be trailing but the fact is it only one goal is perhaps a positive.

Elizabeth Conway
BBC Sport Spanish football reporter at Camp Nou stadium

Image source, Reuters

The game has just absolutely turned on its head. I cannot believe it. Diego Simeone signals his players to stay calm. That's the opposite of the Camp Nou at the moment. They are stunned into near silence.

Ousmane Dembele is surrounded by red shirts but he bides his time and picks out Joao Neves on the edge of the box but the Portuguese drags his effort wide.

Pau Cubarsi's yellow card is upgraded to red for denial of a goal-scoring opportunity.

Barcelona have dominated this first half, but will play the rest of this match with 10 men.

What an opportunity this is for Atletico Madrid.

Paul Robinson
Former England goalkeeper on BBC Radio 5 Live at Parc des Princes

That had everything for PSG. All it lacked was the finish.

Image source, Getty Images

Another huge PSG change.

A sumptuous ball from Khvicha Kvaratskhelia makes its way to Ousmane Dembele but his effort is well saved.

Ohhhhh that's controversial.

Julian Alvarez plays Giuliano Simeone through on goal with a clever pass, and the Atleti forward goes down under contact from Barca defender Pau Cubarsi.

Now the referee has been told to consult the pitchside monitor.

I think we know what this means...

Paul Robinson
Former England goalkeeper on BBC Radio 5 Live at Parc des Princes

Liverpool have had three good opportunities. The three times they have got in behind it has been Jeremie Frimpong in behind. Frimpong has been the most lively for Liverpool.

Image source, Getty Images

That's as good an opportunity as Liverpool have had in this half as Florian Wirtz dinks over a lovely ball for Jeremie Frimpong but the Dutchman's shot on the volley flashes across the face of goal.