Guardiola shakes hands with Thomas Tuchel, before assembling his players for a lengthy post-match berating. That was a stop-start game, hindered by conditions and the number of substitutions, but it improved late on, and Angus Gunn did his prospects no harm with three saves in the shootout. The Pep Guardiola era is up and running. Thanks for joining me. Bye.

Merino’s penalty is unconvincing, and Gunn makes another save! City win the shootout, after it finished 1-1 after 90 minutes.

Angelino scores for Manchester City! 6-5

Tucked into the bottom-right corner by the full back. And now Merino must score for Dortmund...

Larsen misses for Dortmund! 5-5

This is never going to end. Gunn dives to his left to make another excellent save.

Sterling misses for Manchester City! 5-5

You could see this coming. It was a well-struck penalty, to be fair, but Burki tips it around the post...

Hober scores for Dortmund! 5-5

Blasted into the top corner...

Nolito scores for Manchester City! 5-4

Nolito’s first real action in a City shirt is a confidently struck penalty.

Pulisic scores for Dortmund! 4-4

He does, just, as Gunn gets down really well, but sees the ball deflect into the roof of the net!

Aguero scores for Manchester City! 4-3

Aguero, like many others, is unhappy with the surface around the penalty spot, but his effort is low to Burki’s left, beating the keeper’s dive. Pulisic has to score...

Burnic scores for Dortmund! 3-3

Despite Gunn’s attempts to put him off, Burnic coolly sends the young goalkeeper the wrong way...

Silva scores for Manchester City! 3-2

Curled inside the left-hand post to edge City back ahead...

Castro scores for Dortmund! 2-2

The midfielder goes straight down the middle...

Fernandinho scores for Manchester City! 2-1

Three in a row as the City captain rolls the ball in the right corner...

Kagawa scores for Dortmund! 1-1

Kagawa repeats the trick, tucking the ball inside the post.

Adarabioyo scores for Manchester City! (City 1-0 Dortmund)

The central defender belts it into the corner, low to Burki’s right...

Two penalties taken – Sky were still showing adverts, forgive me – but Aleix Garcia and Felix Passlack both saw their penalties saved...

There will be penalties.

Leitner wins a late, late corner and with City’s defence sleeping, rolls it short to Kagawa. He finds Pulisic, who fires it low, through a crowd of players, and between Gunn’s legs.

93 mins: Hober has brought a bit of energy to Dortmund attacks, but is harried out of play close to the corner flag, with time running out...

91 mins: A mistake from Adarabioyo allows Kagawa to dribble into the area, and Fernandinho appears to clip his heels. The referee isn’t buying it, and penalises Kagawa for simulation. That’s a second Dortmund penalty appeal denied.

90 mins: Fernandinho, who looks set to last the full 95 minutes, gets a foot in to make an important challenge on the edge of the area.

89 mins: Hober almost unlocks the City defence with a drilled ball to Pulisic, but the American can’t bring it under control. Five added minutes.

87 mins: Silva and Aguero are capable of passing their way through an opposition defence despite being thirty yards apart; they do so here, but Silva can’t latch onto Aguero’s angled through ball, appealing in vain for a penalty.

86 mins: The crowd are urging a Dortmund equaliser, and the penalty shoot-out it will bring. They seem a little short of ideas. For Manchester City, even in this low-intensity affair, many of their young players have impressed – Adarabioyo in particular.

84 mins: Bony and Touré are taken off to allow Nolito and Sterling to come on. There could still be more than ten minutes left, what with the water breaks and all. Bony doesn’t look happy.

82 mins: A couple more changes coming up for City – Nolito and Raheem Sterling, last seen crashing out of Euro 2016, are going to get a brief taste of on-field action.

79 mins: Bony has worked tirelessly to carve out three chances, all of which he has missed. Agüero hasn’t really been involved, but was in the right place at the right time. A penny for your thoughts, Wilfried. Another City change, just before the goal – Angelino came on for Kolarov.

Dortmund have been threatening for the last few minutes, but City counter, and Aleix Garcia slots a through ball to Silva, who tucks the ball under Bürki and into the path of Sergio Agüero, in front of an empty net. That’s their first ever goal under Pep Guardiola.

75 mins: After Bony dawdles in the opposition area, Dortmund break at speed, with Castro set free on goal – but his shot is tipped over by Gunn. An excellent save from Bryan Gunn’s son – quite literally, a son of a Gunn.

73 mins: Dortmund break down the right, with Maffeo forced to clear the ball awkwardly – it slices wide for a corner. The young full-back did well to avoid an own goal.

71 mins: This Dortmund squad is loaded with quick, tricky young players – Pulisic is the latest to make an impact, testing Denayer twice with runs forward. The second leads to a hefty foul that would surely have earned a yellow card in a competitive game.

69 minutes: More instructions from Guardiola to his players, who have the more senior side on the pitch for the last 20 minutes. By the way, if I know the International Champions Cup, this will go to penalties if it finishes goalless.

Another water break. The local Dortmund fans have broken into the Icelandic thunder clap; it’s already getting a bit played.

65 mins: Manchester City enjoying perhaps their best spell of the match now, with Silva finding Bony, who fires over. He will be keen to make an impression on Guardiola – a bit too keen, on the evidence of the second half.

63 mins: With Dortmund trying to organise themselves, Aleksandar Kolarov strides forward and fires over from thirty yards. Worth a go.

60 mins: Bony has a shot from 25 yards, but it deflects off Barta and is palmed away by Bürki. More substitutions for Dortmund – Burnic on for Sahin, Larsen on for Ramos, Hober on for Bartra. Only two Dortmund starters – Bürki and Moritz Leitner – are still on the pitch.

58 mins: One thing that Dortmund definitely are doing is pressing much higher, fitting nine outfield players into a postage stamp sized space. Their high line almost lets Silva in, but he is flagged offside – wrongly, as it turns out. Silva sees his shot saved by Bürki.

56 mins: Both teams have spent most of the first ten minutes trying to work out each other’s formations; those changes haven’t helped the flow of the game.

53 mins: Ramos finds space on the left-hand side of the box, but his cross-shot is well covered by Adarabioyo, who has performed well. The referee orders Dortmund’s substitutes to put on green bibs, while letting Guardiola’s casual attire slide.

51 mins: Sven Bender and Pusilic link up for a spell of quickfire passing on the edge of the Manchester City area, but can’t carve out a chance. Neater possession, less goalmouth action, is the story of the half so far.

49 mins: Pulisic lofts a high cross towards Ramos, who has stayed on as a lone forward for Dortmund. He brings it down, but is flagged offside. City, led by Silva in a central role, romp forward, but Kolarov is also caught offside on the left.

47 mins: Maffeo, on as a right-back in a more conventional back four with Denayer, Adarabioyo and Kolarov, makes an early slip but recovers to clear.

The second half is under way. Here are the updated teams:

Borussia Dortmund: Bürki; Merino, Bender, Bartra, Passlack; Sahin, Castro, Leitner; Kagawa, Pusilic, Ramos.

Manchester City: Gunn; Maffeo, Denayer, Adarabioyo, Kolarov; Fernandinho, Touré, Aleix Garcia, Silva; Agüero, Bony.

We’ve still not restarted, with the fourth official putting in overtime on the electronic subs’ board – there’s been half a dozen changes for each side, with Agüero, David Silva and Yaya Touré all coming on for City. A full run-down for both teams to follow shortly...