Arsenal seek a chance to attack at the end of the half but the whistle blows and we go to extra time!

The coaches gather their players. Jonas Eidevall is making stern points to players including Lotte Wubben-Moy.

Alex Popp is sipping from a teacup as Tommy Stroot enacts a similar scene to Eidevall with his players circling him. There are roars of encouragement among those players in green.

Image source, Getty Images

As you might expect, it's become a little ragged.

That Sveindis Jane Jonsdottir throw causes confusion in the Arsenal penalty area, but Manuela Zinsberger claims a cross.

Gilly Flaherty
Former England defender on BBC Radio 5 Live

Jonsdottir has a very good throw, so I don't know why Wolfsburg have waited until now in the tie to use that.

Steph Catley concedes a corner.

Frida Maanum clears at the near post and Arsenal win a goal kick.

It's been an all-action performance from Katie McCabe. Sveindis Jane Jonsdottir isn't a player you want to see running at you during the added minutes of a game but the Arsenal captain does excellently to end the danger.

Image source, PA Media

Svenja Huth has made way for Pauline Bremer.

It wasn't the most clinical performance from Huth, although she was a persistent threat and sent a shot marginally wide from a sequence that was deemed offside.

There will be seven minutes of added time. That's what VAR checks and injuries do for you.

Arsenal have a corner on their right following a Katie McCabe free-kick.

Wolfsburg clear to McCabe, who slices a tame low shot into the path of Frida Maanum inside the box. Maanum reacts by bobbling an effort well wide.

McCabe has gone down. She's back up.

Jen Beattie, who brought Arsenal level with that terrific header to make it 4-4 on aggregate, receives treatment for what looks like cramp.

She makes her way to the sideline and is ready to come back on. Beth Mead is among those shouting encouragement at the defender-turned-striker from the stands.

Gilly Flaherty
Former England defender on BBC Radio 5 Live

The players are professionals. It obviously isn't nice to see another teammate go through that, but the team will want to go on now and win it for her and the others.

They've got a job to do.

Image source, Getty Images

Arsenal have now made three of their substitutions, while Wolfsburg have only made one.

That could prove important if the home players feel the effects in the event of extra time.

Emma Sanders
BBC Sport at Emirates Stadium

It's just been announced there are 60,063 in attendance at Emirates Stadium.

It is the biggest crowd for a women's domestic game in England, surpassing last year's FA Cup final attendance of 49,094.

That is also a record attendance for a women's club match outside of Barcelona's Nou Camp.

Image source, Getty Images

This is not what anyone wants to see.

Laura Wienroither is taken off on a stretcher. Kathrine Kuhl comes on.

Wienroither had only just been introduced herself. You really hope that doesn't prove serious.

In between the drama of the goal, Wolfsburg made a change.

Ewa Pajor is the runaway top scorer in the Champions League this season with eight goals, but the striker won't be adding any more tonight. She's been supplanted by Tabea Wasmuth.

Emma Sanders
BBC Sport at Emirates Stadium

Relief all around the stadium. Katie McCabe's celebration told supporters and Jonas Eidevall that the VAR decision had gone their way before it had been blown by the referee.

Gilly Flaherty
Former England defender on BBC Radio 5 Live

What a fantastic header.

Wolfsburg were complaining about a potential free kick, but you've got to play to the whistle.

It's a fantastic finish from Beattie. She's been excellent since moving up front.

Image source, Getty Images

Video Assistant Refereepublished at 77 mins

77 mins

Arsenal 2-2 Wolfsburg (agg 4-4)

The check takes a prolonged period of time. This is so tense. Boos ring out.

It's given! Arsenal celebrate again! Wolfsburg manager Tommy Stroot hides any frustration well. It's 4-4 on aggregate!

Frida Maanum has a shot blocked, then Wolfsburg race to the other end, Ewa Pajor surging clear.

The competition top scorer this season is denied by a superb Lotte Wubben-Moy tackle.

An offside flag is up against the Poland striker, who goes down injured.