Hollie Davidson has sent the Bath man off already in the competition this season, but not this time, to the relief of the Bath ers.
Finn Russell again sends play back into the Lyon half to relieve a spell of pressure after more good work from Joe Cokanasiga.
Bath 17-5 Lyon
Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol
That's off I'm afraid.
Sam Underhill led with his head, right on the cheekbone of the Lyon player.
Whatever way you look at it, it looks ugly.
He's a very lucky boy, that was a nailed-on red for me.
Bath 17-5 Lyon
Image source, PA MediaBoos from the French fans as Sam Underhill's challenge to stop Davit Niniashvili's burst down the left is replayed on the big screen.
It's head on head, and with force - Underhill could well have seen red. But it's a yellow.
Bath 17-5 Lyon
What do we know?
A lightning break down the left and Lyon are suddenly a few metres out from the Bath line, going through the phases.
They spread play to the left, but Finn Russell reads the well and clings on in the tackle.
And Sam Underhill could be in trouble here.
Bath 17-5 Lyon
Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol
You now get a feeling that it's really is beginning to turn.
Bath are so just in their strength. Whenever they get near Lyon's try line it looks like they've got a chance of scoring with their power.
Lyon will get fatigued from defending the big men. They need to score and keep in this game because because Bath's power will just start turning the scoreboard over.
Bath 17-5 Lyon
After a scratchy first 10 minutes or so, Bath look to be taking control already.
Worryingly for Lyon, there were some tired-looking tackles.
Bath look to have too much power for them up front.
Max Ojomoh
Image source, PA MediaSam Underhill almost powers his way over.
But Bath recycle the ball and a long finds Max Ojomoh on the left flank.
He steps out of the tackle and dives over on the left corner.
Finn Russell floats over the touchline conversion.
Bath 10-5 Lyon
Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol
For the first 10 minutes it was a little but nip-and-tuck. Lyon started really, really well but Bath, slowly but surely and with the strength in their team have clawed their way back.
Bath 10-5 Lyon
Lyon the ball quickly through hands, but they're getting nowhere.
Ben Spencer then lands another 50-22 kick as Bath win possession back and push play back deep into the French side's half.
Bath 10-5 Lyon
Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol
It was a good strong run from Tom Dunn, he didn't have to run far but he had Frenchmen who were slightly too high for him, he got a low centre of gravity, he kept running, kept his legs pumping and just about got over the line.
A real hardworking solid try by Dunn and well worked by Bath.
Tom Dunn
Image source, PA MediaBen Spencer goes again from close range and is held up.
Tap penalty for Bath and they're over this time!
Tom Dunn takes it and is powered over the line - with a little help from his friends.
Finn Russell curls the conversion inside the right-hand post and the favourites have a five-point lead midway through the half.
Bath 3-5 Lyon
Big scrum for Bath here just a few metres from the Lyon line.
The Premiership leaders go left, but Finn Russell's scoring to Will Muir goes astray.
Then skipper Ben Spencer is held up as Bath pummel away at the Lyon line.
Bath 3-5 Lyon
Dan Albutt
BBC Radio Bristol
What a break through the middle there from Will Butt showing why he is in this team and what he brings to Bath Rugby.
He is a very physical player, he can make those breaks through the middle.
He's made a habit of doing that for Bath this season.
Bath 3-5 Lyon
Image source, PA MediaA super from Max Ojomoh sends Will Butt through a hole and haring towards the line.
A brilliant recovery tackle from Baptiste Couilloud saves the fday.
First real danger from Bath.
Bath 3-5 Lyon
Much of the play in the middle third - turnovers, spilled es and overhit kicks.
Neither side has properly settled yet. But this is a final. Understandable in the circumstances
Bath 3-5 Lyon
Lyon have a scrum just inside the Bath half and test Joe Cokanasiga with a high kick. It's a great take.
Bath then win a lineout on the Lyon throw. All a bit frenetic.
Bath 3-5 Lyon
Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol
What Bath can't afford now is another bad miscommunication from this kick-off from Lyon.
They really do need to get under this ball.
Finn Russell
Image source, Rex FeaturesPenalty advantage to Bath against Mickael Guillard for not rolling away and Finn Russell opts for the three points.
It's bang in front and never in doubt.
That'll settle a few nerves.
Bath 0-5 Lyon
Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol
It was a really good try by Lyon and a really good start from them.
All Bath have done so far is defended in their own half.
Bath 0-5 Lyon
Bath have still to have possession in the Lyon half and look a little stunned.
Finn Russell kicks the French all the way back into the Lyon 22 and it's a brilliant 50-20, despite a super effort on the touchline.
