The changes made by Arsenal...

ON: Martinelli, Jesus, Vieira, Ibrahim, O'Neill, Ogunnaike, Julienne.

OFF: White, Gyokeres, Tzolis, Dowman, Havertz, Lewis-Skelly, Mosquera.

A word for Ifeanyi Ndukwe. He looked brilliant in that first half and Liverpool fans will be gutted he's got to go out on loan next season because of work permit issues.

Looks one for the future for sure.

Christos Tzolis has been a livewire so far in this second half.

The former Club Brugge looks to be a fantastic signing.

He joined the Gunners in July this summer for £34m.

A couple of Liverpool changes as Alisson and Ifeanyi Ndukwe make way for Giorgi Mamardashvili and Wataru Endo.

Monaco make a change with Jordan Teze taking the place of Vanderson.

The corner is taken short and it is really well worked into the path of Christos Tzolis.

However, Tzolis is offside. You can never write off a goal from an Arsenal corner.

They seemed to have mastered the art of set-pieces last year.

We're back under way at Anfield.

Corner to Arsenal.

Let's see if there's some Nicolas Jover [set-piece coach] magic...

Marli Salmon plays a lovely ball out wide to Ben White, but Arsenal lose possession.

Dortmund break quickly and Salmon is there again to cancel out the attack.

Fine play from the young man.

Dortmund have dropped very deep.

Viktor Gyokeres does really well to find a pass into Kai Havertz, but Dortmund just do enough to clear the ball away.

Kai Havertz tries to get on the end of a cross, but it's just too high for the German.

It's all Arsenal.

Arsenal are working hard out of possession. They manage to win the ball back and try to counter.

Ethan Nwaneri just loses control of the ball on the edge of the box. This game is building nicely...

Christos Tzolis wins the penalty for Arsenal.

He is caught and the referee didn't hesitate. Viktor Gyokeres to take the penalty...

You get the feeling that much of Liverpool's success this season will come down to how well Alexander Isak and Florian Wirtz perform.

They're both capable of something special.

Arsenal are inviting Dortmund out of their shape.

Viktor Gyokeres is playing the ball down nicely for his team-mates too.

Kai Havertz gives away a cheap free-kick. He holds Carney Chukwuemeka and the referee gives the free-kick to Dortmund.

Borussia Dortmund have a free-kick out wide.

Ex-Manchester United man Marcel Sabitzer plays a poor ball into the box. An easy clearance for the Gunners.

Alex Howell
BBC Sport Arsenal reporter at Emirates Stadium

It was an unusual way for Arsenal to concede their third goal as they are usually so reliable from set-pieces.

Mikel Arteta has continued to rotate the minutes of his players though and 16-year-old Marli Salmon is now on at centre back with Piero Hincapie at left back.

Max Dowman isn't short of confidence, is he?

He could have played Kai Havertz in, but the youngster take it on himself.

A comfortable save for Alexander Meyer.

Arsenal are pressing Dortmund high, but the German side is doing well to break the press.