Stephen Warnock
Former Aston Villa defender on MOTD: UEFA Champions League

I don’t think it was any tweak to PSG’s system that made the difference for them in the second half, it was Villa doing things differently that changed the game.

PSG were hoping to draw them out of defence and almost give them false hope by leaving spaces for them to attack into, because they wanted to bring them out of their defensive shape to leave them open on the counter-attack.

Villa are going to have the same problem in the second leg too, especially with the score at 3-1.

Now they will have to go at them, which opens up the game for PSG on the break. If Villa were 2-1 down they could stick with the way they played in the first half tonight, knowing they can nick a goal and level the tie.

PSG wlll be much happier now because they know they have got a two-goal lead to defend, and they also have this threat on the break. The third goal massively changes the tie, and it is massively in their favour now.

You can hear more from Warnock on MOTD: Uefa Champions League at 22:40 BST on BBC One and the BBC Sport website and app.

Paul Robinson
Former England goalkeeper on BBC Radio 5 Live

Aston Villa were outplayed in every single department. Villa couldn't live with the quality that PSG have.

Paris St-Germain swarm all over a team. It is the whole team, every single person, they almost go man-to-man everywhere. It's such a difficult team to play against.

Dion Dublin
Former Aston Villa striker on BBC Radio 5 Live

On Paris St-Germain's goals...

High quality and composure under pressure. Knowing what finish you're going to use.

I tip my hat to PSG - they work hard and get the ball back at pace. They're so balanced at the moment.

Stephen Warnock
Former Aston Villa defender on MOTD: UEFA Champions League

Unai Emery's gameplan was interesting because we are used to seeing Villa play with a high line in the Premier League and then he changed it to a deep line at the start of the game. It was working, and you are thinking how clever and what great management.

So, I was surprised that Villa had a slightly different approach in the second half and were a bit more open. I don't know whether that was a message Emery sent out to the players, or if the team have just got caught out a little bit, but it felt like their midfield was not as close to the back four, and the distance grew between their midfield and attack too, so they were a lot more stretched.

That allowed PSG to counter attack them more, and get behind their defence, compared to the first half when Villa were camped in on the edge of their own box and said to PSG ‘come and break us down’, and they couldn’t - except from a worldie of a goal by Desire Doue.

It is very easy in hindsight but I just wonder if Emery will look back at this game and wonder if he should have made more changes early on, because his team were so stretched, and bring some more energy and legs in.

You can hear more from Warnock on MOTD: Uefa Champions League at 22:40 BST on BBC One and the BBC Sport website and app.

Robert Lewandowski scored two goals tonight, this was the second of them.

And this was how Khvicha Kvaratskhelia put Paris St-Germain 2-1 ahead.

Paul Robinson
Former England goalkeeper on BBC Radio 5 Live

Khvicha Kvaratskhelia was unplayable.

At times Villa couldn't get near him. Axel Disasi didn't know whether to stick or twist.

He was getting beaten by Kvaratskhelia every single time.

Against the run of play, Aston Villa took the lead through Morgan Rogers' goal, although this was as good as it got for Villa.

Karen Carney
Former England midfielder on TNT Sports

That's 23 games unbeaten now for Barcelona. They still keep the ball, they dominate possession, and they're ruthless when you give them space. And because of the frontline, they just keep outscoring you. You'd be terrified to face them

This was arguably goal of the night, and it came from PSG's Desire Doue. Enjoy. Then watch it again. And again.

Paul Robinson
Former England goalkeeper on BBC Radio 5 Live

On Nuno Mendes' goal...

Sensational. Nuno Mendes up from left-back, he gets himself one-on-one with Emi Martinez.

Cruyff turn with his left foot and he curls it into the top corner. The scoreline now reflects the game we have been watching.

Paul Robinson
Former England goalkeeper on BBC Radio 5 Live

Massive. Destroying for Aston Villa. That third goal is huge. Paris St-Germain have been by far the better of the two teams. That's a sucker punch.

Image source, Getty Images

Paris St-Germain fight back from a goal down with a scintillating recovery and three wonderful goals to take control of this quarter-final.

Villa went ahead through Morgan Rogers, but brilliant goals from Desire Doue, Khvicha Kvaratskhelia and Nuno Mendes leave Unai Emery's side with an uphill task in Birmingham.

PSG worthy winners. Great entertainment for the neutral.

Image source, Getty Images

It almost gets worse for Villa right at the death as Warren Zaire-Emery strikes at goal, but Emiliano Martinez has to be at his best to leap high and get fingertips to it to tip it over the bar.

Steve McManaman
Former Real Madrid winger on TNT Sports

Very accomplished performance from Barcelona. They've done tonight what they've done for the majority for the year: cruised through the game and scored four more goals.

Stephen Warnock
Former Aston Villa defender on MOTD: UEFA Champions League

That is a huge goal. It has changed the whole tie.

You can hear more from Warnock on MOTD: Uefa Champions League at 22:40 BST on BBC One and the BBC Sport website and app.

That's it. Barcelona are pretty much there.

Borussia Dortmund will have to forget about this result quickly. They face Bayern Munich in their next match at the weekend.

Image source, Getty Images