The second half begins.

Sevilla bring on former Wolves and Nottingham Forest forward Rafa Mir, plus midfielder Joan Jordan for Thomas Delaney and Ivan Rakitic.

Erling Haaland had four of City's nine shots in the first half, including both of their shots on target.

He only attempted five passes.

James McFadden
Former Scotland forward on BBC Radio 5 Live

It's been incredible. The noise at the start, Celtic's chances. Madrid have had their moments too. It has been everything we expected and more, we're just missing a goal. Overall, Celtic will be really happy with how the game's gone so far.

Follow that game here.

Former Chelsea midfielder Joe Cole on BT Sport: "Where do we start? Balance, I think that's the key. The new guys at the back have really got to pull it together as soon as they can. There’s no flow. We could’ve picked countless incidents where Koulibaly was on the wrong side. For a 31-year-old defender, he really needs to get up to speed.

"At the other end of the pitch, is there a lack of confidence starting to develop? There’s a lot of talk of lack of goals, lack of assists. The front three, he made four or five changes in that area, and they all look low on confidence. They’re all quality players at Chelsea but for some reason it’s just not happening for the likes of Pulisic, Ziyech etc."

It's only a 1-0. But it's a comfortable 1-0.

AC Milan have levelled in Salzburg - it's 1-1 now. Alexis Saelemaekers is the fifth Belgian player to score a Champions League goal for an Italian side.

Kevin de Bruyne cuts the ball back to Erling Haaland and Thomas Delaney throws himself at the ball to put it behind before it reaches Haaland.

Sevilla have a chance from the free-kick to level. It comes into the mixer and Thomas Delaney lays the ball off to Papu Gomez, who hammers a shot high and wide.

City defender Sergio Gomez elbows Thomas Delaney in the back and looks shocked at the referee giving a free-kick against him.

Erling Haaland runs in behind the Sevilla defence and fires in a low shot from a tight angle which Bono saves and Ivan Rakitic clears.

City have a free-kick as Alex Telles, now playing at left-back, fouls Rodri.

Manuel Akanji can't find a team-matre with his header down.

This is one of those City games where they look so comfortable. Yet only lead by one.

Salzburg lead AC Milan 1-0 thanks to a Noah Okafor goal.

Okafor is Salzburg's joint second top scorer in the Champions League with four. Erling Haaland is top with eight.

Sevilla have a corner, which Jack Grealish heads away. But only as far as Marcos Acuna, who takes a touch and drills it wide of the far post from 25 yards.

Kev: Haaland really is the definition of "Fox in the Box". Unreal.

Richard T: Most strikers are judged by goals per game. Haaland is judged goals per touches - just incredible!

Yikes, Real Madrid have lost Karim Benzema to injury at Celtic Park. Eden Hazard is on!

Follow that here.

Close. Kevin de Bruyne steps up for a free-kick on the corner of the box and curls it into the side-netting.

Erling Haaland is the fourth player to score on his Champions League debut for at least three different clubs, after Fernando Morientes (four) and Javier Saviola and Zlatan Ibrahimovic (both three).