Of the many Chelsea candidates for player of the match, Jess Carter may be the stand out.

Salma Paralluelo almost gets in one on one, only to be denied by a sensational sliding tackle from Carter.

Fridolina Rolfo then fires in a low cross from the left, right across the six yard area, missed by everyone.

Image source, Getty Images

Pat Nevin
Former Chelsea and Scotland winger on BBC Radio 5 Live

Against good teams all it takes is to switch off for one second.

Catarina Macario had to hold the ball up there, Barcelona turned the play over and fashioned a chance almost out of nothing.

Barca's best chance!

Caroline Graham Hansen with yet another great cross, flat and hard to the far post where Salma Paralluelo steams in away from her marker.

The winger cannot control her volley from six yards out however, and it skews wide.

Pat Nevin
Former Chelsea and Scotland winger on BBC Radio 5 Live

What I can't believe is that the energy levels have kept up from Chelsea all the way through the game, right until the end.

One word you can bet on Emma Hayes saying after the game is 'proud', her players have given everything they've got to the game plan and delivered exactly what she has asked them to do.

Replays show Irene Paredes caught Sjoeke Nusken with her studs up.

She's lucky only to get a yellow there. The Chelsea players, still around Stephanie Frappart, may be saying the same thing.

Image source, Reuters

Another home yellow, as Irene Paredes takes a swipe at Sjoeke Nusken's ankle.

It's a nasty, frustrated tackle, and Nusken is still down.

Johanna Rytting Kaneryd pins Fridolina Rolfo back near the Barca corner flag, and is unlucky to concede a throw in.

This has been such a hard-working display by Chelsea.

Pat Nevin
Former Chelsea and Scotland winger on BBC Radio 5 Live

These minutes are the hardest minutes of these types of games.The players are tired mentally, physically, and they have worked so, so hard this afternoon.

I think this is the hardest I have seen them run in a game under Emma Hayes.

Image source, Getty Images

A first booking of the game, goes to Patricia Guijarro for dragging down Mayra Ramirez.

Ramirez has been an absolute terror for the Barca defence today. A superb performance.

Image source, Getty Images

Barcelona had Chelsea under the pump before that Ramirez chance, and have resumed possession in the away half after it.

Chelsea fans must pray they will not be repeating that chance in their heads tonight.

Pat Nevin
Former Chelsea and Scotland winger on BBC Radio 5 Live

It could be a huge moment in the tie.

Mayra Ramirez was one against two, shrugged off one defender, got her back to goal against the other.

But by the time she turned and shot she had just run out of gas.

Shows how dangerous Chelsea can still be on the break though.

That was the chance for 2-0!

Mayra Ramirez does absolutely brilliantly, turning an aimless long ball into a clear chance by holding off two defenders.

She turns into the area, one on one with Cata Coll - and fires over the bar.

Huge miss.

Image source, Getty Images

Another home change, as Mariona Caldentey - who has endured a frustrating day up front - is replaced by Vicky Lopez.

A first sub for Chelsea too. Lauren James' race is run, she comes off for Catarina Macario.

Pat Nevin
Former Chelsea and Scotland winger on BBC Radio 5 Live

Barcelona are upping the pressure and pace now.

We expected the onslaught to come a bit earlier but those changes a few minutes ago have given them a noticeable boost.

You just start to look towards the Chelsea bench now to see how they may respond. Lauren James hasn't had too much of an impact on this game, so maybe some legs in the middle there to replace her could help.

Image source, Getty Images

Another player down, this time in Barcelona colours.

Irene Paredes got clattered by Jess Carter as the Chelsea defender made a clearance. No foul, but certainly a sore one.

The Chelsea fans in Barcelona might disagree, Em.

Emma Sanders
BBC Sport at Estadi Olímpic Lluís Companys

Chelsea are doing everything in the playbook to hold on to this victory. Hannah Hampton is taking her time over goalkicks and they are slowing everything down. It's frustrating everyone in the stadium!

Image source, Getty Images

Caroline Graham Hansen with yet another teasing cross from the right. Chelsea's defence with yet another clearing header.

Fridolina Rolfo then wins a corner off Erin Cuthbert, but again it is defended well.

Image source, Getty Images

Ian: I hope Chelsea aren't trying to run the clock down already. It's a dangerous tactic against Barca.

Gordon: This is becoming amazing for Chelsea. An hour gone and Hampton has not had to make a save.