RESULT: Man City 5-0 Copenhagen - Erling Haaland scores twice in first half before being taken off at break. Own goal, Riyad Mahrez penalty and Julian Alvarez tap-in earn win
RESULT: Chelsea 3-0 AC Milan - Wesley Fofana, Pierre Emerick-Aubameyang and Reece James on target for Blues
RESULT: Real Madrid 2-1 Shakhtar Donetsk
RESULT: Sevilla 1-4 Borussia Dortmund - captain Jude Bellingham scores and assists
RESULT: Benfica 1-1 PSG
RESULT: Juventus 3-1 Maccabi Haifa
RESULT: RB Leipzig 3-1 Celtic
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Man City 1-0 Copenhagen
Viktor Claesson brings down Joao Cancelo in the middle and it's not long after that a ball is sent long searching for Erling Haaland. It will go straight through to the goalkeeper.
Man City 1-0 Copenhagen
Erling Haaland has scored his 27th Champions League goal, breaking Ruud van Nistelrooy's record for most goals in a player's first 30 appearances in the tournament.
This is only his 22nd game.
Man City 1-0 Copenhagen
Chris Bevan
BBC Sport at Etihad Stadium
That was Erling Haaland's first touch of the night. He didn't waste it, did he?
Image source, Getty ImagesMan City 1-0 Copenhagen
Alistair Bruce-Ball
Commentator on BBC Radio 5 Live
He doesn't miss from there! Deadly.
He's just ridiculous.
Chelsea 0-0 AC Milan
First yellow card as Milan's Rade Krunic chops down Ruben Loftus-Cheek.
Chelsea 0-0 AC Milan
Nice Milan move around the box but Charles de Ketelaere's through ball can't find Rafael Leao.
Erling Haaland (7 mins)
Of course.
Even the stadium announcer says "goal for City, who else? Erling Haaland."
It's not taken him long at all. The ball comes in from Joao Cancelo and he's unmarked as he curls it first time into the right corner.
Another brilliant finish and Pep Guardiola is laughing on the touchline.
Image source, Getty ImagesSevilla 0-1 Borussia Dortmund
Raphael Guerreiro opens the scoring for Dortmund after just six minutes with a stunning strike from distance.
Dortmund captain Jude Bellingham picked the full-back out with a sumptuous crossfield pass.
Man City 0-0 Copenhagen
Chris Bevan
BBC Sport at Etihad Stadium
No goals yet but City had 90% possession in the first five minutes and played 59 accurate passes out of 59 attempts.
Copenhagen have played six passes and lost the ball on two of those occasions. They are finding it hard to get it back.
Chelsea 0-0 AC Milan
Matt Upson
Former England defender on BBC Radio 5 Live
Milan have started very well. They've took the ball in every situation.
Chelsea at the moment can't get a hold of the ball.
Chelsea 0-0 AC Milan
First chance falls to Chelsea. Pierre-Emerick Aubameyang can't take a through ball properly in his stride but he finds Mason Mount, who curls a shot towards the bottom corner. It's well saved by Ciprian Tatarusanu.
Man City 0-0 Copenhagen
City are already getting chances. Joao Cancelo hits a half-volley in the box which was meant to be a shot. It ends up slicing towards Erling Haaland but he can't react to the pass of it.
Man City 0-0 Copenhagen
Sergio Gomez is urged to shoot by the City fans and he does from a long way out. He scuffs it but it bounces off a defender awkwardly and almost falls for Bernardo Silva in the box before it's hastily cleared.
Chelsea 0-0 AC Milan
No action at all yet. Chelsea have conceded a few free-kicks through Kalidou Koulibaly (twice) and Mason Mount.
The referee has a word with Koulibaly.
Man City 0-0 Copenhagen
City have started how you would expect with lots of possession. The 1000-odd visiting fans are in fine voice.
Chelsea 0-0 AC Milan
Under way in the Andriy Shevchenko derby.
We also had a silence for the Indonesian stadium victims.
Image source, Getty ImagesMan City 0-0 Copenhagen
Off we go at the Etihad. Another hat-trick from Erling Haaland perhaps?
Both teams observed a minute's silence in memory of the Indonesian disaster.
Man City v Copenhagen (20:00 BST)
A very strong Manchester City team head out of the tunnel. A chance to see Aymeric Laporte and Ruben Dias together in the side with them both back from injury.
Chelsea v AC Milan (20:00 BST)
Will Faulks, Talk Chelsea, external
This is a game which will see the new regime face their first big test.
After two fairly sleepy matches to start Graham Potter's spell as manager, this sees a whole new level of competition and atmosphere, with a night game at Stamford Bridge with knockout qualification likely resting on the result.
Milan are riddled by injuries, but they're still reigning Serie A champions and they have looked good this season despite their absences. They will present a huge challenge for Potter's team, who didn't look too impressive at the weekend despite the mini pre-season they were handed by their two postponements last month.
It will be interesting to see whether the coach sticks with the back four he used at the weekend, or whether we should get used to alternating systems game to game. There's also the question of how he deals with rotation.
A draw and a narrow win were not the "new manager bounce" we were hoping for and, while this is a long-term project, it still will need early momentum if it's ever to get off the ground.
A statement win would be the perfect start.
Man City v Copenhagen (20:00 BST)
Chris Bevan
BBC Sport at Etihad Stadium
Image source, BBC SportIt's tipping it down at Etihad Stadium tonight, and the only other thing here as relentless as the rain is the noise from the Copenhagen fans.
Led by an extremely loud drummer, they've been singing non-stop since their team ran out to start a - very wet - warm-up.
No sign of them, or this downpour, stopping anytime soon.