Arsenal are penned inside their own half. Manuela Zinsberger is forced to make a save with her feet after the defence fail to clear.

The Gunners are living dangerously.

Double change for the Germans who send on former Manchester City forward Pauline Bremer and Sveindís Jonsdottir.

Steph Catley gets a booking for a foul on Lena Oberdorf. The Wolfsburg player is down getting treatment so Arsenal make a change and send on Tobin Heath.

Arsenal are on the attack. Stina Blackstenius tries to pick out Beth Mead but it's cut out.

There is a lot of activity on the Arsenal bench. They won't want to go to Germany for the return leg behind. Jonas Eidevall is about to make his first change.

Oh no. Beth Mead, who has been at the heart of Arsenal's best moves, picks up a yellow card after colliding with an opponent.

That's bad news for Arsenal. Mead will now miss the second leg after a yellow in an earlier game.

Michael Emons
BBC Sport at Emirates Stadium

The way this first leg has gone, even if Arsenal go to Germany with a one-goal deficit they will still fancy their chances, but they have to be wary of getting hit again and conceding a second.

Wolfsburg, praised before the game by Jonas Eidevall for their skill and pace at counter-attacks, so nearly hit Arsenal with a sucker punch as goalscorer Tabea Wassmuth, clean through, hits the post before seconds later ex-Arsenal midfielder Jill Roord does likewise, flicking Lena Lattwein's pass against the upright.

Arsenal are coming at Wolfsburg again. A lovely pass by Kim Little picks out Beth Mead inside the box but she is ruled to be offside. That's a tight call.

That was a lucky escape for Arsenal. Can they take advantage?

Kelly Smith
Former England and Arsenal striker on BBC Radio 5 Live

It's a stand up save by Manuela Zinsberger and the ball goes onto the post.

It's why Arsenal have to be switched on and not make mistakes at the back. If you don't take your chances, like Arsenal haven't, Wolfsburg can punish you.

Incredible!

Wolfsburg hit the post TWICE in the space of a few seconds.

After Tabea Wassmuth's attempt comes back out off the woodwork, Jill Roord strikes a post as Arsenal struggle to get it clear.

Image source, Reuters

Arsenal have certainly upped the pace. Wolfsburg are struggling to get out of their own half. The Gunners have had 10 attempts so far but only one has landed on target.

Alexandra Popp goes into the book for a lunging challenge on Beth Mead. Another free-kick deep inside the Wolfsburg half.

They're getting closer and closer!

Great skill by Beth Mead inside the box before she drills it across the face of goal. Vivianne Miedema stretches out a leg in an attempt to divert it over the line but she cannot connect.

Michael Emons
BBC Sport at Emirates Stadium

Arsenal have made a very bright start to this second half as they push for an equaliser.

Beth Mead's pull-back from a dangerous position couldn't find a team-mate and then Stina Blackstenius almost converted from Noelle Maritz's excellent low cross but, from a tight angle, couldn't hit the target.

Blackstenius then put the ball in the net after rounding Almuth Schult but the home fans' cheers were quickly stopped by an assistant's flag for offside. We have VAR in action in the Champions League, but no need for lines to be drawn on television screens as Blackstenius was clearly offside.

Kelly Smith
Former England and Arsenal striker on BBC Radio 5 Live

Arsenal have started the second half extremely well, on the front foot. They are pressing Wolfsburg higher up the pitch and we have had that disallowed goal. They have a belief about them now.

Arsenal are really piling on the pressure. One disallowed goal and two chances inside the opening few minutes of the second half. They've just won a corner which was taken quickly but came to nothing.

And now Arsenal have the ball in the back of the net.

Stina Blackstenius sprints forward and takes an extra touch to go round Almuth Schult before tucking it over the line.

But it's not going to count. The offside flag is up.

Image source, PA Media

Big chance!

Stina Blackstenius cannot get her angles out as her first time attempt is sliced wide after being picked out by Noelle Maritz.

Encouraging start by Arsenal. They're throwing everything at this.

No changes by either side. Arsenal need to speed it up and inside the opening minute of the new half Beth Mead finds space inside the box and tries to pick out a team-mate but it's blocked.