Fran Kirby - whose penalty was saved at the end of the first half - is replaced by Beth England for Chelsea.

In case any of you are unfamiliar with Lyon boss Reynald Pedros - here's a photo of him, and his quite wonderful hair.

Image source, Reuters

Pat Nevin
Former Chelsea and Scotland winger on BBC Sport

"Chelsea just need a little bit more from the creative ones up front. When they get to the final third, the final ball hasn't been good enough."

Delphine Cascarino, who has been really lively down the right this afternoon, fires wide from just outside the box.

It's all Lyon at the moment, with half an hour to go in this first leg.

Wendie Renard flicks a far-post header wide for the hosts this time.

Chelsea are under pressure.

Lyon winger Eugenie Le Sommer creates room for herself to shoot from the left but Ann-Katrin Berger is there at her near post to make a smart stop.

Delphine Cascarino gets a good cross in from the right for Lyon, but Ada Hegerberg fires wide from it.

Wales' Sophie Ingle does well to get in a block for Chelsea, denying Ada Hegerberg a shot at goal.

Moments later, Lyon's Delphine Cascarino shoots straight at the keeper

Pat Nevin
Former Chelsea and Scotland winger on BBC Sport

"It's really delicate for Chelsea. You're still in the tie, you'd love to get an away goal, but 3-0 would make it a massive mountain to climb against this Lyon side"

Meanwhile, Lyon's second goal has been officially credited to the hosts' Amandine Henry, who was jumping for the ball alongside Jonna Andersson.

It wasn't entirely clear if it hit either player, to be honest with you, but it might have got the faintest of touches off Henry.

Image source, Reuters

Chelsea's Maren Mjelde gets past Wendie Renard and in to the area, but her strike is parried away by Lyon keeper Sarah Bouhaddi.

That's another excellent chance for Chelsea to get an away goal.

Lyon get this game started again. Can Chelsea turn this around?

To remind you, you can have your say on today's action via #bbcfootball.

Elsewhere, Liverpool have beaten Bristol City 5-2 in the WSL this afternoon.

You can read all about that game by clicking here.

Chelsea have played well in spells and they'll be frustrated to be trailing to two relatively soft goals.

Chelsea will be disappointed as they go in two-goals down at the break in this first leg.

Pat Nevin
Former Chelsea and Scotland winger on BBC Sport

"That is as soft a penalty as you will ever see."

England's Fran Kirby steps up... But it's straight at Sarah Bouhaddi and it's saved.

Eugenie Le Sommer catches Ramona Bachmann and Chelsea have a penalty!

There wasn't much contact, right on the edge of the area on the left-hand side, and you could argue that the Switzerland forward made a lot of it, but Hungarian referee Katalin Kulcsar doesn't hesitate in pointing to the spot.

Chelsea certainly have it all to do now, but just one goal for them away from home would completely change the complexion of this tie.