Dortmund's Donyell Malen is booked for holding onto the ball on the ground to stop Rodri taking a free-kick.

Sometimes a substitution is very clear as to the intent of the manager. This is one of those times.

Borussia Dortmund bring on centre-back Nico Schlotterbeck for striker Anthony Modeste.

They go to a back three/five.

Corner to City and the noise levels go up. Can they create a proper chance here? Not really. Rodri flicks the ball behind at the near post.

Chelsea aren't guaranteed these three points just yet. Noah Okafor gets on the end of a cross for RB Salzburg and is free enough to produce a glancing header at goal.

But Kepa Arrizabalaga is well positioned to fall on the ball but that's a warning for Graham Potter's side.

Dion Dublin
Former England striker on BBC Radio 5 Live

Hummels and Sule know each other’s game so well. They’re not the quickest but their positional play and calmness is so good. They seem to know where the ball is going and they seem to know where Haaland’s going to be!

Image source, Getty Images

Third time's the charm for Napoli from the penalty spot.

Barisic blocks a shot with his harm, so McGregor faces his third penalty of the night - but cannot keep this one out, Politano finishing low to his left.

Elsewhere, PSG have turned it around at Maccabi Haifa - Kylian Mbappe puts them 2-1 ahead.

This has been a masterclass from Mats Hummels and Niklas Sule at the back for Dortmund.

Phil Foden whips in a low cross and Erling Haaland is there at the back post ready for a tap-in - but Sule throws himself at the cross to put it behind for a corner.

Every time it's coming towards Haaland one of the two German centre-backs are there.

Armando Broja has not been on for long, but he needs some medical treatment now after a painful looking clash of heads. But Broja's OK to carry on.

A warning to Dortmund...

City have won each of their last five Champions League home matches in which they were trailing - against PSG, Porto, Atalanta, Spurs and Hoffenheim.

Armando Broja is immediately involved in the action for Chelsea but, under pressure, can't guide a shot on target when he had looked to be through.

Dortmund's keeper still hasn't had a save to make tonight.

Dion Dublin
Former England striker on BBC Radio 5 Live

I'm expecting Haaland to go across the keeper there, on his weaker right foot. You expect him to make the keeper make a save.

Joao Cancelo cuts in and plays an inswinging ball which Kevin de Bruyne can't reach.

Jorginho plays a ball over the top for Kai Havertz to volley at, but he misses the ball and that's his last action as he and Pierre-Emerick Aubameyang are replaced by Armando Broja and Ruben Loftus-Cheek.

Loftus-Cheek will be very keen to not just impress his new team boss but also watching England manager Gareth Southgate too.

Great lunging dive by Niklas Sule to stop the ball reaching Erling Haaland 10 yards out. You can see Dortmund are so aware of his threat.

Erling Haaland's first sight of goal and it's so close. He runs between two defenders onto Kevin de Bruyne's ball, lets it bounce and then hits the outside of the post from a tight angle. Keeper had it covered though.

Noah Okafor of RB Salzburg throws himself to the ground in the Chelsea penalty area...and gets nothing. Play on.

David Ljunggren: Grealish yet again showing he is not needed when the crunch comes. I wonder how much City secretly regret having signed him

Tambuwal: Bellingham is worth £150m in today's transfer market.

Simon Stone
BBC Sport at the Etihad Stadium

There is a line of police and a line of security between the two sets of fans in the far corner.

I have seen stuff thrown from both sides.

It doesn't look like there is any actual clashes but there is a lot of noise, particularly from the Dortmund contingent.