Postpublished at 21:45 British Summer Time 28 September 2021
AC Milan 1-1 Atletico Madrid
Atletico Madrid have left it late, but it looks like they may have salvaged a point at the San Siro.
Antoine Griezmann volleys home against AC Milan.
Result: PSG 2-0 Man City - Gueye and Messi
Messi's first goal since joining PSG
Result: Porto 1-5 Liverpool - Salah (2), Mane & Firmino (2)
Reds on maximum points after first two games
Moldovan champions Sheriff Tiraspol win 2-1 at Real Madrid - one of biggest shocks of Champions League era
Use play icon to follow BBC Radio 5 Live's Final Score
Shamoon Hafez and Emma Sanders
AC Milan 1-1 Atletico Madrid
Atletico Madrid have left it late, but it looks like they may have salvaged a point at the San Siro.
Antoine Griezmann volleys home against AC Milan.
PSG 2-0 Man City
Michael Brown
Former Man City midfielder on BBC Radio 5 Live
City's passing is getting a bit disjointed now they're trying to force it. They've been in the game, they don't deserve to be losing. Ultimately you have to keep it tight against PSG because the counter is very quick.
Porto 1-5 Liverpool
Curtis Jones has two assists to his name but he wants a goal. He curls it towards the far corner. Diogo Costa gathers it in.
PSG 2-0 Man City
Wouldn't say a tactical masterclass but it's in and around that region from Mauricio Pochettino.
His side soaked up a lot of bluster from Manchester City and have two goals courtesy of two clinical finishes.
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Brilliant as Pep is, surely an elite finisher makes a difference for them in this type of match?
Jim, Isle of White
This game is the PRECISE reason why City need a world class striker. Shockingly wasteful in front of goal.
Myk, London
Get off your phone Sham!
Roberto Firmino (81 mins)
It's been given!
Liverpool have scored five in Porto again! Roberto Firmino has his second.
PSG 2-0 Man City
Just got a message on WhatsApp re. Messi.
"Class is permanent."
Too right.
PSG 2-0 Man City
Man City are not going to score tonight, there is no way past Gianluigi Donnarumma who denies Riyad Mahrez.
That's the PSG goalkeeper's sixth stop of the contest.
Porto 1-4 Liverpool
There's a penalty check here too. Was there a handball by Fábio Cardoso in there too?
#bbcfootball
Scott: What an absolutely belting goal for Messi. No keeper saves that. Wow.
Greg Morter: Lionel Messi it was always on the cards
Porto 1-4 Liverpool
Roberto Firmino thinks he's got a second as he pounces on a rebound from Curtis Jones' volley.
It's ruled out for offside but VAR are looking... It's very tight!
PSG 2-0 Man City
And that is Marco Verratti's last action of the game, he is replaced by Georginio Wijnaldum, not a bad sub to bring on.
Gabriel Jesus enters the action for City.
PSG 2-0 Man City
Marco Verratti has had a fine game and is booked for a trip on Raheem Sterling.
Yes, it is 2-0 to PSG. Lost my bearings after that stunner.
PSG 2-0 Man City
Michael Brown
Former Man City midfielder on BBC Radio 5 Live
Incredible from Lionel Messi, as Marco Verratti comes out in the centre of the pitch he just hands to the right hand side on the half way line and his arm comes out as if to say give it to me I'm available. Kylian Mbappe just kays it back to him right on the edge of the area, his finish is incredible. He curls it into the top right corner with his left foot.
The stadium erupts - remarkable Messi.
Roberto Firmino (76 mins)
What. Is. The. Goalkeeper. Doing.
From the brilliance of Lionel Messi in Paris, to the stupidity of Diogo Costa in Porto.
He comes charging out to the halfway line, for no reason whatsoever, and Curtis Jones lifts it over the top.
Roberto Firmino picks it up, sees the keeper on top of him and rolls it into an open net from about 40 yards out! It just about goes over the line.
Lionel Messi (74 mins)
WHAT A GOALLL!!!
Lionel Messi gets his first for PSG and in stunning fashion.
The Argentine has been kept quiet for most of the game but nets his 121st Champions League goal,
He picks the ball up down the right and then is given space to run for the first time.
It's played into Kylian Mbappe, who flicks it away first time and Messi curls a sumptuous finish into the roof of the net.
Ederson barely moved. He could only stand and admire the finish.
PSG 1-0 Man City
Michael Brown
Former Man City midfielder on BBC Radio 5 Live
Phil Foden is only going to get better, he glides through the games, he's a wonderful talent. Whether he's asked to play as a nine and goes to press or asked to play wide on the left-hand side, he just gets on and plays.
Real Madrid 1-1 Sheriff Tiraspol
Karim Benzema (72) surpasses Raul (71) in the all-time leading Champions League goalscorers' list.
Only Cristiano Ronaldo (135), Lionel Messi (120) and Robert Lewandowski (75) have scored more.