Image source, Reuters

Having scored Atalanta's first goal, Duvan Zapata picks out Alejandro Gomez who smashes a shot in off Midtjylland's crossbar to make it 2-0 to the visitors.

And there is still time before the break for Luis Muriel to make it 3-0.

The Italians, who are in the same group as Liverpool and Ajax, are in total command in Denmark.

Meanwhile, it's stalemate in Milan where Inter have created the better chances without finding the back of the Borussia Monchengladbach net.

Romelu Lukaku has gone the closest with a clever shot from an angle which rolled narrowly wide of the post.

The half-time whistle goes at Etihad with this game level.

There's been some nervous moments in the Manchester City defence, with Kyle Walker producing an excellent clearance to prevent the visitors from retaking the lead.

The whistles goes at just the right time for Liverpool with Ajax putting on a bit of pressure before the break.

The visitors lead through that Nicolas Tagliafico own goal.

Brilliant defending by Fabinho as he gets back to clear off the line after Dusan Tadic had got in behind before lobbing Adrian. That was incredibly close.

Brilliant from Kyle Walker as he hooks the ball off the line after Moussa Marega's low cross deflected towards the goal off Joao Cancelo.

The holders are 2-0 up and that's another superb goal. Kingsley Coman does the damge down the left again, beating a defender and then picking out Leon Goretzka who rifles into the bottom corner.

Another strong run by Andrew Robertson and he picks out Mohamed Salah on the edge of the box. Salah rolls the ball onto his other foot and curls an effort at goal but it is blocked.

Good defending by Chancel Mbemba as he cuts out Riyad Mahrez's cross with Sergio Aguero lurking.

The Manchester City defence is having to be careful with Joao Cancelo having picked up a yellow, to add to Kyle Walker's earlier booking.

Ederson gets down to hold Zaidu Sanusi's cross. There's a brief break in play with Sergio Aguero down, but nothing to worry about and he is soon OK to continue.

The break may have been no more than 30 seconds but that's still enough time for Pep Guardiola to call over Raheem Sterling and provide some quick instructions.

Atalanta don't do goalless draws.

So far this season the Italians have been involved in 4-2, 4-1 and 5-2 league wins, while they lost at Napoli 4-1.

They're ahead in Denmark where Duvan Zapata has scored against Midtjylland.

It's the first goal in Group D as Liverpool and Ajax is still goalless.

Andrew Robertson drives a ball into the box with pace as Liverpool attack but Andre Onana is there to it first.

Better from Liverpool.

And now Bayern lead! Kingsley Coman, who scored the winner in the final 59 days ago, is picked out by a long ball over the defence and buries a clinical finish.

Kyle Walker catches Moussa Marega late and he is shown a yellow card.

Walker needs to be careful now, especially as he has to keep an eye on the lively Luis Diaz.

Porto are sitting deep and staying compact, making life difficult for Manchester City but Luis Diaz looks a good outlet for the visitors.

He is always ready to pounce on a defensive mistake and get the ball up the pitch quickly. The hosts have to be wary, despite dominating possession.

The holders have found their game after a patchy start. Robert Lewandowski blazed a volley just wide and Niklas Sule planted a shot against the post as Bayern take hold of this game.

Since making his Champions League debut for Liverpool in September 2017, Mohamed Salah has netted 19 goals in the competition for the Reds - the most of any player for an English club in this period.

He's not had much chance to add to that tally yet with Ajax keeping Liverpool's attackers pretty quiet so far.

Chris Bevan
BBC Sport at Etihad Stadium

Is there an award for 'loudest substitute'? Fernandinho is sitting directly in front of me and is making quite a racket on his own.

Stephen Warnock
Ex-Liverpool defender on BBC Radio 5 Live

Ajax creating opportunities because of Liverpool's mistakes. Got to give Ajax credit because of the way they're pressing - they're going two v two or three v three at the back and then they go man for man on the press and it's causing Liverpool problems.