Final score: Exeter Chiefs 34-12 Castres
Exeter Chiefs score 5 tries to secure bonus point
Castres score 2 tries
Tudor Stroe shown red card for Castres
Jack Nowell Man of the Match after scoring try on his return
Choose from BBC Radio 5 live sports extra & BBC Radio Devon commentary
Exeter 5-5 Castres
Jonny Hill is through! He times his run perfectly to burst between defenders and come within inches of the tryline.
The ball pops up and into Castres hands, though. The French side tap it down to give Exeter a 5m scrum.
Exeter 5-5 Castres
Exeter's offloads are lightning-quick but they're still hanging around the 22.
Exeter 5-5 Castres
Exeter can't make any ground with the scrum, but swing it right again and there's impressive footwork from Santiago Cordero. He almost makes it to the 22.
Exeter 5-5 Castres
Castres make it over the halfway line, but there's a forward pass to captain Robert Ebersohn.
Exeter 5-5 Castres
Henry Slade attempts a huge flat pass right to Jonny Hill, but it's a bit too much for the lock. Castres win a scrum.
Exeter 5-5 Castres
Ludovic Radosavljevic kicks it high and Exeter show they're ready to run again.
Nic White gathers and the hosts quickly advance towards the 22.
Brent Pilnick
BBC Sport at Sandy Park
That wasn’t part of the plan.
Castres showing there are not here to make up the numbers as they show a bit of class to release Paris in the corner.
This could be a real humbdinger.
Image source, Getty Images
Exeter 5-5 Castres (Paris)
Did I not say we were going to get a shed-load of tries? I feel smug.
Castres go into a maul off the line-out but only make a couple of metres. They decide to go through the backs instead and Taylor Paris finds plenty of space to go over on the right wing.
Benjamin Urdapilleta's conversion hits the post.
Exeter 5-0 Castres
They may have drawn first blood, but Exeter don't have all the momentum.
Castres show they can run it just as well, swinging the ball left to right through the backs. They win a penalty and kick to the corner.
Exeter 5-0 Castres
Benjamin Urdapilleta with the restart and Exeter gather just outside their 22. Nic White sends it high and Castres struggle in the sunshine.
Exeter concede a penalty though and the French side have the scrum.
Brent Pilnick
BBC Sport at Sandy Park
Vintage Jack Nowell there showing that devastating acceleration and deft sidestep to leave the Castres defence reeling.
Not only is it just what Exeter fans want to see after a couple of months out, but it’ll give Eddie Jones food for thought as well with the Six Nations not far off
Image source, Getty ImagesExeter 5-0 Castres (Nowell)
So Jack Nowell is back.
Exeter work through 14 phases when the returning Nowell decides he's had enough. He grabs the ball and dances through defenders, sprinting into the right-hand corner.
Simmonds' conversion swings left.
Exeter 0-0 Castres
Some good breaks from Exeter's backs in the opening minutes. Santiago Cordero bursts through first, then Ollie Devoto.
Exeter are up to the halfway line now.
Exeter 0-0 Castres
We're under way.
The sun is going to make life difficult under the high ball, particularly for Exeter in this first half.
Castres have possession on their 22 and kick high, but Joe Simmonds deals with it well.
Brent Pilnick
BBC Sport at Sandy Park
A deafening roar as Exeter run out in front of their home fans.
Can they keep their slim hopes of progressing alive?
Image source, BBC SportExeter v Castres (13:00 GMT)
Exeter captain Jack Yeandle takes a deep breath before he leads Exeter out and the Tomahawk chop rings out across Sandy Park.
Here we go.
Exeter v Castres (13:00 GMT)
It looks like we're in for a treat today.
The sun is shining and Sandy Park is packed - surely the perfect combination for a shed-load of tries.
Exeter v Castres (13:00 GMT)
Radio coverage of the game is now live. You can listen to BBC Radio 5 live sports extra and BBC Radio Devon at the top of this page.
Exeter v Castres (13:00 GMT)
Brent Pilnick
BBC Sport at Sandy Park
Exeter’s team and fans know today is a must-win if they are to avoid being knocked out with a game to spare.
A defeat would mean elimination, and also leave Saracens as the only English side to make the knockout stages.
If that happens it’ll only be the fourth time that one English side has made the quarter-finals since the tournament began.
Exeter v Castres (13:00 GMT)
Even if they win today, Exeter face a tough task in the final round.
They must travel to Thomond Park to take on pool leaders Munster but, Chiefs director of rugby Rob Baxter is backing his side.
"I've said to the lads, if we go to Munster with something to play for, you're effectively in the last 16 of Europe," he said.
"If we win this week and we go there with something to fight for, it's probably a straight knock-out match and you'd probably take that in a lot of ways."
Image source, Getty Images