FT: Harlequins 21-19 Bristol
FT: Saracens 35-3 Worcester
Burger scores on Saracens debut
FT: Northampton 14-18 Bath
Bath's Faletau injured on debut
Northampton 0-0 Bath
The game is under way at Franklin's Gardens.
While the main focus will remain on the conclusion of the Saracens v Worcester game and part two of the London Double Header, we'll bring you regular updates from Northampton throughout the afternoon.
Image source, Getty ImagesSaracens 28-3 Worcester
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"That is seriously dangerous and James Johnston is lucky not to be off the field. Yellow card as a minimum really."
Saracens 30-3 Worcester
That will please Saracens fans.
Schalk Burger, on debut, crosses the line for his first try for his new club and my word it was well worked by the 'home' side.
Both Vunipola brothers are involved in the build up before the ball is quickly played to Burger, who, with the help of Brad Barritt, pushes over the line.
Saracens 23-3 Worcester
Ouch!
Alex Lozowski has been in the wars today and is on the end of a high tackle from James Johnston. Johnston immediately puts his hands up to apologise but is still send to the bin.
He looks disappointed with himself.
It's all Saracens now as Richard Wigglesworth takes charge of their play in the Worcester 22, but so far they can't get through...
Saracens 23-3 Worcester
Worcester boss Carl Hogg makes three changes in a bid to try to turn the tide of this game, but they were still working out their positions on a Saracens line-out and give far too much space to their opponents.
Debutant Alex Lozowski may still be struggling with an injury, but he finds a gap to cross over the line before stepping up and converting.
After a nervy start, the man who started in place of Owen Farrell has done well.
Your club's season in six words
Simply Southville: "Stay up and beat Bath twice" Come on @Bristol_RFC
Saracens 16-3 Worcester
Saracens win yet another penalty and Worcester look like they are losing their heads.
Alex Lozowski can't kick it as he twisted his leg in a tackle, so Alex Goode opts to kick for the posts, but hits the posts.
Saracens 16-3 Worcester
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"The yellow shirts just disintegrated there. It was as if Worcester just gave up. What has just happened in the past few minutes to the Warriors?"
Saracens 16-3 Worcester
Image source, Rex FeaturesAlex Lozowski rightly kicks for the corner and off the back of the line-out Jamie George touches down on his 150th Saracens appearance.
Lozowski then hits the conversion over and this is a healthy looking scoreline for Saracens.
What has happened to Worcester, though? They looked so well trilled in the first half.
I say that, but they have to remember the basics...
A loose pass allows Saracens the chance to run towards the line, before Saracens eventually win a penalty.
Saracens 9-3 Worcester
Nails it. Sarries extend their lead but it's not a convincing one at the moment. If Worcester are a little more adventurous I can see them really testing their opponents.
Saracens 6-3 Worcester
Worcester prop Val Rapava Ruskin is down hurt and receives treatment for quite some time.
Worcester lose a subsequent line-out and some ill-discipline gives Alex Lozowski another kickable penalty...
Saracens 6-3 Worcester
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Meanwhile, we're back under way at Twickenham.
HT: Saracens 6-3 Worcester
Matt Dawson
2003 World Cup winner on BBC Radio 5 live
"Worcester are a strong side and have been competitive throughout this first half, but without really showing any pizzazz."
I agree, Mr Dawson.
Northampton v Bath (15:30 BST)
Good to Bath's assistant boss is comfortable in Northampton...
Northampton v Bath (15:30 BST)
Bath hand a Premiership debut to Wales back row Taulupe Faletau and scrum-half Kahn Fotuali'i starts against his old club Northampton at Franklin's Gardens.
Another summer arrival, Wales lock Luke Charteris, misses new director of rugby Todd Blackadder's first league match in charge with a slight groin strain.
Image source, BBC SportReplacements: Dunn, Auterac, Palma-Newport, Sisi, Ellis, Cook, Priestland, Williams.
Northampton v Bath (15:30 BST)
France number eight Louis Picamoles will make his first start for Saints.
New signings Nic Groom and Charlie Clare are named on the bench, alongside Wales wing George North.
Saints, the 2014 champions, ended up outside the play-offs last season, finishing in fifth.
Image source, BBC SportReplacements: Clare, Ma'afu, Hill, Dickinson, Harrison, Groom, Myler, North.
Northampton v Bath (15:30 BST)
Former England and Bath centre Jeremy Guscott is in place at Franklin's Gardens for BBC Radio 5 live.
Team news coming up...
Saracens 6-3 Worcester
It's not exactly been try chances galore at Twickenham with all of our points coming from the boot. Let's hope for a little bit more action in the second half.