Attacking change for Chelsea at half-time. Hakim Ziyech replaces Cesar Azpilicueta. Back four?

Chelsea won only one of the 11 Champions League group stage away games they trailed at half-time, a 2-1 victory at Atletico Madrid on 27 September 2017.

They have only lost their opening match in two of their 18 Champions League seasons.

Peter Crouch
Former Stoke striker on BT Sport 4

If I'm the manager, I'd be angry. Chelsea had it in the palm of their hand - I just thought they took liberties. And as soon as Zagreb got a goal, they’ve had something to hold on to. They’re no mugs, they’ve got dangers up front.

David Payn: 'Shock lead?' Hardly, with the way Chelsea have been playing this season.

Arjun Singh: Fofana showing inexperience tonight. I think he’ll be better for it, but it’s a shame it comes at the expense of Chelsea.

Chelsea have been disappointing in that first half. Mislav Orsic is the scourge of London again.

The half-time whistle goes and Dortmund are in control.

Good block by Ben Chillwell to deny Mislav Orsic a second goal. And luckily for Chelsea Luka Ivanusec air-kicks a clear opportunity in the box.

Chelsea striker Pierre-Emerick Aubameyang goes for a header but doesn't make proper contact. He's probably got a bit of wariness, playing in a mask after being injured during a violent robbery recently.

Dortmund double their lead after Raphael Guerreiro slots in following a nice one-two with Giovanni Reyna.

After a good spell of attacking, now Dinamo are defending well in numbers. Chelsea can't cut through the wall of blue.

Dinamo are doing much more attacking than Chelsea right now. Dare I say the visitors are penned in a bit?

Martin Keown
Former England defender on BT Sport 4

You have to say, Chelsea have not got that balance yet. They need to be quicker in the way they move the ball. All the talent is there, they’ve just got to do things quicker.

Borussia Dortmund lead in Germany. They break quickly from a Copenhagen attack and Julian Brandt finds Marco Reus, who takes a touch or two before slamming a shot into the bottom corner.

Mateo Kovacic wins the ball off Mislav Orsic... and then passes it to a Dinamo player.

Maybe he forgot he left Zagreb in 2013.

Dinamo are very efficent. They look like scoring every time they go forward, despite not having much of the game overall.

Arijan Ademi's volley from outside the box is parried away by Kepa.

Dinamo have a free-kick now. A chance to increase Chelsea's pain? Almost...

The free-kick bounces round the box and that man Mislav Orsic curls just wide of the top corner. He was actually the guy who had taken the free-kick in the first place.

Since the beginning of 2020-21, only Karim Benzema (eight) has scored as many goals in European competition versus English opposition as Mislav Orsic (five).

An early setback for Borussia Dortmund as Thorgan Hazard gingerly makes his way off the pitch to be replaced by Giovanni Reyna, who was born in Sunderland when his dad Claudio was playing for them.

The hosts are already without several of their normal starters so that is less than ideal.

That was Dinamo Zagreb's first Champions League goal under boss Ante Cacic (excluding qualifiers).

He was in charge for five games in 2012-13 and they lost all five without scoring (0-13 overall score).