Dangerous cross from Melanie Leupolz, and Bayern keeper Laura Benkarth has to tip the ball behind for a corner.

But the corner is far too close to the keeper, who claims.

More defending for Chelsea left-back Niamh Charles to do, as she slides to block a cross by Lea Schuller.

Any Bayern goal swings the tie massively in their favour.

Image source, Reuters

Chelsea striker Sam Kerr gets into a crossing position on the right, but the Australian can't get her delivery right.

The hosts retain possession, and a good defensive interception stops Fran Kirby from latching on to an attempted through ball.

Good response by the Blues after being forced onto the back foot.

Ji So-yun leads a counter-attack which ends with winning a corner on the right.

The visitors are momentarily down to 10 as Sydney Lohmann gets some attention on a facial injury.

Brilliant defensive header by Jess Carter to nod behind a cross from Klara Buhl.

A red shirt was lurking behind her at the far post.

Bayern have started the second half with purpose and Chelsea need to weather the storm.

Bayern start the half on the attack and Niamh Charles and Ji So-yun crowd out Hanna Glas in the right-hand corner.

Then Jess Carter gives away a free-kick some 35 yards out for a foul on Bayern goalscorer Sarah Zadrazil.

Carter gets a yellow for that challenge.

Image source, Getty Images

After a cracking first 45 minutes, what will the second half provide?

Both these clubs are aiming to make their first-ever Women's Champions League final.

One more Bayern goal would mean Chelsea have to score twice because of the away goals rule.

Can Emma Hayes and the Blues make history and become just the second English club to reach the final?

The winners of this tie will face Barcelona in the Women's Champions League final.

The Spanish side beat PSG 2-1 earlier today, clinching a 3-2 aggregate win, and you can read more by clicking the link below.

The final is in Gothenburg in two weeks' time.

What a first half that was.

Fran Kirby's goal gave the Blues the lead but Sarah Zadrazil's wonder-strike put Bayern back ahead on aggregate.

But Ji So-yun netted a low shot to give Chelsea a big boost heading into the break.

No added time at the end of the first half.

The tie is all level after a breathless first 45 minutes.

As things stand, it's all square. No more goals in the second half and we'll be heading for extra-time.

Chelsea get a free-kick in a good position as Fran Kirby is caught late by Bayern captain Lina Magull.

The midfielder gets the game's first caution.

It's 20 yards out, just to the right of the D. Prime spot for an attempt at goal.

Good passage of play for Chelsea as Ji So-yun is set up for a shot from 30 yards out.

Marina Hegering gets her head to it and diverts the ball behind for a corner.

The visitors deal with the resulting set-piece comfortably.

The visitors almost grab their second and it's a let-off for the Blues.

Lineth Beerensteyn steals possession just inside the Chelsea half and frees Lea Schuller.

Schuller gets into the box and sends her shot wide of the left-hand upright.

She hits the supporting pole behind the goal-net, and probably should have hit the target.

Replays show Amanda Ilestedt did get a bit of a touch on Ji So-yun.

I don't think it was really enough to award a spot-kick.

Chelsea claims for a penalty are waved away by referee Esther Staubli.

Ji So-yun goes to ground while trying to get on the end of a return pass into the box.

There looked like there was some contact with the Bayern Munich defender - but probably not enough.

Bayern get another corner and try and work a move from the training ground.

The ball is squared back to Klara Buhl in space on the edge of the area.

But the forward can't get her connection right and Chelsea manage to snuff out the danger. It was a let-off as Buhl was well placed for a shot at goal.

How can Chelsea respond to that?

The Blues find themselves needing another goal to keep their hopes of reaching the final alive.

It was a breath-taking goal by Sarah Zadrazil. A moment of true quality on the European stage.

Another free-kick from Bayern swung in from out on the left.

Niamh Charles is there to head it behind and concede a corner.