Llanelli look to be the best-placed club to surge into the quarter finals and a win against French giants Perpignan would provide a huge boost to the side currently top of the Welsh-Scottish league.
A win in France would blow the group wide open and set up a winner-takes-all showdown against Leicester next week at Stradey Park.
Judging from past seasons, the West Wales side have every reason to remain optimistic as they prepare to take on the French side.
Victories over Bourgoin and Colomiers prove the Scarlets have discovered the secret ingredient of winning on French soil.
Scott Quinnell will start the game from the bench having been ruled out for the last month with a knee injury, but is expected to play a part in the game.
Coach Gareth Jenkins said: "This is a big game for us and we know we have to win if we are to progress in the tournament.
"The secret to playing on French soil is not to try and play a running game because there is noone better than the French at that. What you have to do is try and silence the crowd which in turn will affect the team's temperament."
Meanwhile, Cardiff will be bidding to keep their Heineken Cup dreams alive with a morale boosting win over Montferrand at the Arms Park.
The Blue and Blacks have to win their two remaining games if they are to remain in contention for one of the best runner up spots.
The Welsh side will have received a boost with the news that Montferrand openside flanker Olivier Magne has been ruled out through injury.
Bridgend could do Cardiff a huge favour if they beat Castres at the Brewery Field on Saturday. A victory over the French club would increase Cardiff's chances of claiming one of the elusive runners-up positions.
Despite having lost all four games so far, the Ravens will be looking to end the group stages on a high note.
Newport will be hoping to keep alive their slim chances of clinching qualification when they lock horns with another French giant Toulouse.
Qualification for the last eight may be out of their hands following an agonising home defeat against Leinster, but Newport could still go through if they beat Toulouse and then Newcastle next week and other results are kind to them.
Swansea, who face Bath at St Helen's tomorrow, have delayed naming their side because of injury problems.
Wales lock Andy Moore has been ruled out with a neck strain while flanker Colin Charvis is doubtful.
The Whites have a mathematical chance of still qualifying but would have to run in five more tries than Bath following their 38-9 reverse at the Recreation Ground last October.
It was a double celebration for Wales and Ospreys scrum-half Rhys Webb when he called at the home of Welsh rugby to help commemorate the first anniversary of Principality Stadium and his return to fitness this weekend ahead of the RBS 6 Nations.
Prior to their departure to Wellington for the next leg of the World Series, Wales trained with England and Ireland. WRU TV caught up with Owen Jenkins who revealed the 'buzzword' which is driving the Wales squad on.
Wales head coach Rob Howley explains his decision to change the captaincy of the national side with Ospreys second row Alun Wyn Jones taking over from Sam Warburton for the forthcoming RBS 6 Nations. Howley is hoping his decision will allow Warburton to rediscover his 'mojo'.
How do you follow a dancing hippopotamus - the Ospreys wheelchair rugby team has just the 'oneness' to do it say the BBC! For a decade the sight of a herd of hippos synchronised swimming around their own private blue lagoon, has lit up our television screens at regular intervals between favourite BBC One shows. But now the nation's most watched channel has relinquished its famous amphibious mammals in favour of a new show-reel which includes the Ospreys wheelchair rugby team.
Head coach Rowland Phillips and key front rower Carys Phillips look ahead to games against Spain and Ireland as Wales Women ramp up their preparations for the forthcoming Six Nations. The two warm-up games are a 'massive opportunity to refine the squad' according to the Welsh camp.
Martyn Phillips has discussed details of the newly published 'Strategy for Welsh Rugby' which puts in black and white terms the plans and direction of the governing body of the national sport in Wales for the next decade.
WRU chief executive Martyn Phillips has urged Welsh rugby fans to follow in the footsteps of their soccer counterparts at last summer's Euro Championship by backing their team to the hilt in the upcoming RBS 6 Nations campaign.
Chief executive Martyn Phillips has highlighted the plans for Wales to become a breeding ground for national and elite club rugby coaches, which are contained in the WRU's 10-year 'Strategy for Welsh Rugby'.
Andrew Coombs is enjoying his new role as Nelson forwards coach. The former Dragons and Wales lock has big ambitions to become a professional coach but feels it's important to learn the ropes in grassroots rugby and where better than his home club Nelson, with friends and family close to hand.
Students at Brynllywarch Hall School, near Newtown, have transformed their own lives, and are now having a positive impact on others through rugby. The sport has had a life-changing effect on the well-being of the students who are now delivering rugby sessions to local primary schools and playing for a new mixed ability side
Wales reached their first semi-final since 2013 in the opening round of this season's HSBC World Rugby Sevens Series in Dubai. WRU TV's Graeme Gillespie recaps on what proved to be an eventful tournament
Wales and Ospreys back row James King, who came through the North Wales age grade system, nominated North Wales Regional Community Rugby Manager Marc Roberts, in the WRU's 'Diolch' initiative where squad players thanked those who played a part in their rise to the top.
Beating Merthyr has boosted Carmarthen Quins hopes of reaching a top eight spot in the Principality Premiership. Quins captain Haydn Pugh is delighted with his team's progress and is determined that everyone from the Under 6s through to the senior team, enjoys the ride.
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.