Rachel Corsie
Scotland and Aston Villa defender on BBC Radio 5 Live

You absolutely expect Svenja Huth to score there.

She's a senior international player, she's been in that position many times. But she's just dragged that one wide.

That could have sealed the game for Wolfsburg!

Equally, that could now galvanise Arsenal. When your opponent has that sort of chance and doesn't take it, it makes you go 'hold on a minute, let's use that to lift ourselves.'

Image source, Getty Images

Manuela Zinsberger is receiving some treatment.

Defender Jen Beattie, who was part of the Arsenal side who lost the club's first ever tie against Wolfsburg 10 years ago, is now being deployed in attack.

Image source, Getty Images

Hearts in mouths time for the home squad and fans!

Svenja Huth will feel she should have scored here. Sveindis Jane Jonsdottir releases her with a fine crossfield pass, affording the livewire space inside Arsenal's penalty area on the right.

Huth's finish flashes narrowly wide of the far post. Tommy Stroot applauds.

Wolfsburg will be comfortable with how this game has gone since they went ahead.

The crowd, who've been superb all night, raise the noise levels again.

Gilly Flaherty
Former England defender on BBC Radio 5 Live

It's a big call from Jonas Eidevall to take off Stina Blackstenius. She's been excellent this game, she's a natural number nine and has scored a goal.

Here come those changes. There's one arguably big call by Jonas Eidevall, who swaps Stina Blackstenius for Lina Hurtig.

Blackstenius scored the opener and would have had a second at the start of this half but for a VAR decision.

Noelle Mauritz, who was on a yellow card, also makes way for Laura Wienroither.

The most recent semi-final to go to extra time was in 2009-10, when Turbine Potsdam beat Wolfsburg on penalties after the tie finished 1-1.

Arsenal manager Jonas Eidevall is animated. He's clearly preparing to make changes.

His side may have under 30 minutes to rescue their dream of making the Champions League final.

Gilly Flaherty
Former England defender on BBC Radio 5 Live

Alex Popp does so well to get in the space, away from her marker Rafaelle. It's a difficult header as well, she's running away from goal and she gets the header down.

There seemed to be shouting. It may have been a bit of miscommunication between Maanum and Zinsberger.

But it is a difficult header to make and a fantastic finish from Popp.

Image source, Reuters

Rachel Corsie
Scotland and Aston Villa defender on BBC Radio 5 Live

Maybe a few of the more senior players need to get an arm around Katie McCabe and get her away from those battles - it will only favour Wolfsburg.

If they're going to win this game, they need her to stay on the pitch. She is a leader herself but her teammates need to calm her down.

Image source, Getty Images

Frida Maanum is one player capable of bringing Arsenal back into this tie.

Her diagonal shot on the stride from distance stings the hands of Merle Frohms, who gathers.

Lea Walti clears off the line following another Wolfsburg corner!

Arsenal are living dangerously. They need to stem this pressure.

Wolfsburg are applying pressure.

Rafaelle Souza concedes a corner on Arsenal's left. Their opponents can't capitalise.

Arsenal clear Wolfsburg's corner, and Stina Blackstenius looks suitably frustrated after running the ball out of play from a promising position on the right in her side's ensuing attack.

Emma Sanders
BBC Sport at Emirates Stadium

That was a very nervy moment for Manuela Zinsberger! Half the stadium thought it had gone in.

A nervy moment for Manuela Zinsberger, who misjudges the spin on the ball deep inside Arsenal's penalty area after Felicitas Rauch angles in a free-kick following that booking for Jen Beattie.

It bounces over the goalkeeper - and, mercifully for the Gunners, behind for a corner.

A second yellow in quick succession: this time it's Jen Beattie, who's punished for hauling back Ewa Pajor.

The home fans remain boisterous following what they thought was a goal for Arsenal early in this half.

Svenja Huth goes into the book for a challenge on Katie McCabe on a sideline.

Arsenal galkeeper Manuela Zinsberger is forced into action, recovering the ball in her goalmouth.