The Ospreys are sweating on the fitness of star duo Ashley Beck and Justin Tipuric ahead of the crunch Heineken Cup clash with Leicester Tigers.
The Swansea-based region must maul the Tigers to keep their European hopes alive but could be without the international pair.
Beck is unlikely to recover from an ankle injury in time and Tipuric's chances are rated at 50/50.
"Tips is doing some rehab and is 50-50, but we are waiting on some extra information on Ashley Beck, who is a real doubt," said Ospreys head coach Steve Tandy.
"Tips has been huge for us, Becky, too. It something we've had to get used to this season, with senior players missing, people like Ian Evans, Alun Wyn Jones, Aaron Jarvis and Hanno Dirksen.
"If we lose Beck and Tips it will be a huge task for us, especially given the limited squad we have. But it's something we have to prepare for and we are going to give it a right old go."
Tandy was more hopeful of having Tipuric available for selection but he insists he will take no risks despite the magnitude of the game.
"There's always that temptation but we won't put the group before the player," said Tandy.
"If he's not right, he's not right. There are educated risks in what we are doing, but I need to sit down with the physio and see where they are come Friday.
Tom Issacs is set to fill the void left by Beck and Sam Lewis is a front-runner to start if Tipuric fails to recover.
And Tandy insists the Ospreys are confident of the duo coming in and producing the goods.
"We have no issues with TI (Isaacs) starting at 13 this weekend. He did really well for us there against the Scarlets earlier in the season.
"We'll weigh things up in the back-row, but we have a boy in Sam who's outstanding every time he wears the shirt.
"He was out on his feet at the end of the Zebre game, especially after his performance against the Dragons. He is developing all the time.
"You find out more about people on these big occasions and we are keen to develop from within. I know if Sam has to step into the role he won't let us down."
Wales Under 18 captain Callum Bradbury is delighted to have seen his side claim a narrow 18-17 victory against a strong SA Schools 'A' side to end the three-match Under 19 International Series in South Africa on a high note.
The Wales U18 squad spent an emotional day in the drug-riddled townnship of Hout Bay. Hout Bay Warriors President Fred Johannes said the visit was 'the talk of the town' and will dream about the day everyday for the rest of his life.
RGC 1404's new head coach Mark Jones is hoping to build 'something special' in north Wales and is already looking forward to the development region participating in the Principality Premiership for the very first time.
A joint venture between the WRU and Admiral saw hundreds of children enjoy the Admiral Festival of Rugby held at the National Centre of Excellence at the weekend where Welsh internationals Sam Warburton, Scott Williams and Rob Evans were in attendance.
Wll Jones leads Wales U18s into battle this afternoon against Italy where the Welsh side will be seeking to bounce back from their narrow defeat to SA Schools in their opening clash of the U19 International Series
All four regions attended a successful training camp staged last weekend at the WRU National Centre of Excellence. It was a chance for new Wales Women's head coach Rowland Phillips to deliver his key messages to players and coaches as he prepares for the new season.
Wales U18 Team Manager Gethin Watts believes the next couple of weeks will be 'extremely beneficial' to the future of Welsh rugby as his side prepare to take part in the Under 19 International Series being staged in South Africa.
The WRU is searching for 12 new rugby development apprentices following a successful first year of its WRU Coach Core programme. Craig Duncan and Jess Hancock have flourished in the first year of the programme which has given them a real direction in their lives.
The WRU signed TV comedian Rhod Gilbert up to a 'Coaching Children Level 1' course before letting him loose on an U8s side at Whitland Junior Borderers - we went behind the scenes to film the making of 'Rhod Gilbert's Work Experience' see the results here.
Llandovery are aiming to make it three titles in a row in this year's Foster's National 7s being held at BT Sport Cardiff Arms Park on Sunday 28 August. Drovers assistant coach Simon Davies and Lee Rees assess their sides chances
A pioneering strength and conditioning programme has been delivered to more than 8000 boys and girls at hub schools throughout Wales this season, helping to develop stronger, more flexible athletes for rugby and other sports.
The Singha Premiership Rugby 7s Series returns to the BT Sport Cardiff Arms Park on July 22nd when all four Welsh regions go head to head. Scarlets skills coach Dai Flanagan and Blues Elite Performance Pathway Manager Richard Hodges along with current Welsh squad members were at the launch of this season's event