- Barcelona suffer their joint-heaviest defeat in European competition in their 118-year history after hammering in the French capital.
- Angel di Maria scored two wonderful long range efforts on his 29th birthday.
- Julian Draxler on the score sheet on his European debut for PSG.
- Edinson Cavani rounded off the scoring with his strike after 71 minutes.
- Benfica 1-0 Borussia Dortmund: Kostas Mitroglou scores game's only goal with Pierre-Emerick Aubameyang missing from the penalty spot.
A wretched night for Barcelona draws to a close. Their 4-0 loss to PSG tonight is their joint-heaviest defeat in European competition in their long 118-year history. If they are to fight back in the second leg, they will have to become the first side in Champions League history to come back from a 4-0 deficit. Good luck with that.
Full-time: PSG 4-0 Barcelona
Full-time: Benfica 1-0 Borussia Dortmund
Into injury time here and much to the delight of Barcelona, they have four more minutes of this to live with.
Barcelona hit the post! From a corner kick, Pique unselfishly heads back across goal to his centre-half partner Umiti but his effort comes back off the post. Not their night.
Kimpembe makes another sublime challenge to intercept Suarez. He's been outstanding on his Champions League debut tonight.
That's about as good as it has got from Barcelona tonight. Neymar is onto a neat knockdown from Messi and lashes a half volley across goal, but it veers wide of Trapp's far post.
Cavani makes it four on what might very well be Lionel Messi's worst ever night in a Barcelona shirt.
What has happened to Barcelona tonight? Meunier brilliantly side steps Neymar well in his own half, at least 75 yards away from ter Stegen's goal. The Belgian strides forward unchallenged with no Barca player showing the slightest interest in closing him down. He reaches the edge of the D and slides an easy ball through for Cavani whose run wasn't followed and he produces another superb finish, drilling into the far corner.
Goal! PSG 4-0 Barcelona (Edinson Cavani, 71)
Verratti doesn't need the stretcher, but he looks in some pain as he hobbles off. PSG taking no chances, Christopher Nkunku comes onto replace him.
Marco Verratti's evening looks to be over; what initially looks like cramp now looks to be something a bit more serious with a stretcher coming on for the Italy international.
Lucas Moura strolls through Barca's defence unchallenged with space opening up in front of him to shoot. He has a teammate breaking into space to his right but ignores him but instead slides a weak effort straight at ter Stegen.
Meanwhile in Lisbon, Benfica took the lead thanks to Fulham legend Kostas Mitroglu, who was on the scene to convert Luisao's knockdown from close range.
Dortmund had the chance moments ago to pull level from the penalty spot but Pierre Emerick Aubameyang has just missed! Woeful effort from the Gabon international; he was leaning back as he strolled up to the spot and skied it well over the bar.
On his birthday, Di Maria is now coming off after a sensational evening. Lucas Moura replaces him.
Andre Gomes has a woeful evening; the only thing of note he's done is leaving a stud print on Draxler's ankle. He's hooked with Rafinha coming on.
That is outrageous from Di Maria! Receiving the ball 25 yards out from goal, he takes a touch before fooling Iniesta with a superb body swerve, one that also sends Busquets off in the wrong direction. Having moved the ball onto his left, Di Maria bends an outstanding effort into the far corner, perfectly placed past ter Stegen.
The build-up play to that wasn't bad either. It started from Trapp's goal kick, with Rabiot and Draxler doing superbly well in moving it up field.
Goal! PSG 3-0 Barcelona (Angel di Maria, 54)
Goal! Benfica 1-0 Borussia Dortmund (Kostas Mitroglou, 47)
Iniesta now slides a simple pass straight out of play. What is going on?
Nothing has changed in this second half, PSG look sensational, Barcelona are turning in one of their worst performances in this competition in some years.
Rabiot does brilliantly, steaming onto a loose ball and driving through the middle of the box past three Barcelona players before clipping a wonderful ball across goal. It's just out of the reach of Marquinhos, who is still up from a corner moments ago, and sails out.
This strike saw Barcelona fall 2-0 behind just before the end of the first-half. Is there any way back for them?
And we are back underway for the second-half.
Half-time: Benfica 0-0 Borussia Dortmund