It's almost 2-0!

Fran Kirby hits the post as she stretches to meet a cross at close range.

It's a thoroughly deserved lead for Chelsea.

Atletico Madrid have been reluctant to go for it despite their player advantage and it's the Blues who have been asking the questions in this second half.

What a perfromance this has been so far by Emma Hayes' side.

Sam Kerr darts across Aissatou Tounkara towards goal and the Atletico defender chops her down!

Huge opportunity for Chelsea.

Sam Kerr is played through by So-yun Ji but the flag is immediately up for a marginal offside.

The attempts are building for Chelsea. So-yun Ji again takes aim from distance but her attempt is well off target.

If one of those goes in it suddenly becomes a very good night for the hosts.

So-yun Ji almost gets her side into trouble at the back with a loose touch but Chelsea recover and clear their lines.

There's still not much urgency in Atletico Madrid's attacking play

It's a really promising start to the second period by Chelsea, but So-yun Ji's shot from the edge of the box is comfortable enough for Hedvig Lindahl.

Almost the perfect start to the second half for Chelsea!

Sam Kerr is played through on goal and she takes a touch to set herself before firing into the side-netting. Great chance.

The second half begins!

If you were unable to join us earlier, Manchester City ran out 3-0 winners in their last-16 first leg against Fiorentina.

Elsewhere, Barcelona beat Fortuna Hjorring 4-0, Rosengard and St Polten drew 2-2, and Wolfsburg won 2-0 against LSK Kvinner.

Five attempts by Chelsea in the first half, compared to three for Atletico.

Pernile Harder and So-yun Ji both missed great chances for the Blues. Surely we'll see more from the visitors after half-time.

It's goalless at the break, after a red card for Chelsea and a missed penalty for Atletico Madrid.

Hedvig Lindahl comes out to punch the free-kick clear.

Just one minute of added time to come at the end of the first half.

Not a great half for Deyna Castellanos who, having missed the penalty, recieves a yellow card for a foul on So-yun Ji.

Chelsea will have the chance to whip a free-kick into the box here...

A good spell for Chelsea in the last few minutes, playing in the Atletico half.

Pernile Harder tries a cheeky, chipped attempt from outside the box, but keeper Hedvig Lindahl reads the situation well and catches.

Image source, Getty Images

Laia Aleixandri fouls Sam Kerr which will allow Chelsea the chance to get some players up the pitch.

The Blues play it short and work the ball into the box, where Pernile Harder's close-range attempt is blocked by a defender.

Emma Hayes will be pleased with how her side have held up in this first half. They've never really looked stretched.

'Keep going' Hayes shouts at Niamh Charles as she carries the ball away from her goal and into the Atletico half.

Chelsea still look the more dangerous in attack.

So-yun Ji goes on a run across the edge of the Atletico penalty area before feeding in Fran Kirby, but the pass is just too close to keeper Hedvig Lindahl.