Straight up the other end, Chelsea almost find an instant away goal in reply, but Karen Carney's shot is blocked.

Lyon's Selma Bacha curls a shot straight at Ann-Katrin Berger from a free-kick on the right.

Her team-mates were hoping for a cross and they're not best pleased.

There are still around 145 minutes to go in this tie, of course, so Chelsea have plenty of time to turn this around.

And an away goal could be vital.

You can't help but feel for Magdalena Eriksson, who has had a terrific season. She was a rock for Chelsea at the back for the vast majority of this campaign.

Two own goals in two huge consecutive games is harsh.

Magdalena Eriksson accidentally diverted a tame cross in to her own goal in stoppage time of Chelsea's Women's FA Cup semi-final last time out.

On that occasion, you had to question the communication between defender and goalkeeper.

This time, she's attempted to block Delphine Cascarino's shot, but Chelsea keeper Ann-Katrin Berger may well have had it covered, before it angled in off Eriksson at the near post. There was little Berger could do.

Chelsea win a free-kick around 35 yards out on their left but, from it, Karen Carney's cross is majestically headed clear by Lyon skipper Wendie Renard.

Pat Nevin
Former Chelsea and Scotland winger on BBC Sport

"You just can't stop Lucy Bronze - she's incredible."

After a good run down the right from England's Lucy Bronze, Ada Hegerberg's first-time shot is brilliantly turn behind at the near post by Ann-Katrin Berger.

That's a super, instinctive stop from the Chelsea keeper.

Image source, Getty Images

After a slightly edgy start, Chelsea have settled in to this game now. Emma Hayes will be relatively pleased.

Maren Mjelde goes on a promising run for Chelsea but Karen Carney doesn't quite see a dangerous run around the back from Erin Cuthbert, and a decent opening for Chelsea comes to nothing.

That was encouraging for the visitors though.

Pat Nevin
Former Chelsea and Scotland winger on BBC Sport

"In warm weather, it's very, very tiring if you haven't got the ball, and are having to chase it."

Dzsenifer Marozsan's deep corner towards the far post is nodded wide by Lyon's Ada Hegerberg.

Lyon, in contrast, are seemingly in a 4-2-3-1 formation, with Ada Hegerberg leading the line up top.

Chelsea are setup with the hope of getting an away goal, by the looks of it.

Pat Nevin
Former Chelsea and Scotland winger on BBC Sport

"Just looking at Chelsea, they are effectively playing 4-5-1, which becomes 4-3-3 when they attack."

Wales' Jess FIshlock trickles the first shot of this tie low and straight at Chelsea keeper Ann-Katrin Berger, who gathers it.

Lyon haven't lost a competitive game since 31 May last season and they beat PSG - their closest rivals for the French title - 5-0 last time out.

And just to remind you, it was PSG who Chelsea edged past in the quarter-finals with a last-gasp goal.

Remember, you can have your say on the action via #bbcfootball on social media.

Chelsea, in their traditional blue kit, get this semi-final started.