Gavin Henson will learn today if he has any chance of recovering in time to play for the Ospreys in their Heineken Cup quarter-final against reigning champions Munster at Thomond Park on Sunday, 12 April.
The Ospreys and Wales star underwent an MRI scan on the ankle he damaged in the EDF Energy Cup semi-final defeat by Gloucester last weekend and will get the full results later today.
As well as focusing on the Heineken Cup, Henson is also hoping to make a second tour with the British & Irish Lions this summer.
Lions coach Ian McGeechan names his squad on April 21 and will be sweating on Henson's fitness after the golden boy of Welsh rugby left the Ricoh Arena in Coventry on crutches.
An Ospreys statement read: "Gavin Henson met with a specialist and had an MRI scan today and we are now awaiting a formal report and feedback on his condition and prognosis.
"We will be fully informed as to the extent of his injury in the next 24 hours, and will issue a further update accordingly."
Henson, 27, made one Test start for the Lions on the tour to New Zealand which ended in whitewash four years ago. It is the latest setback for Henson, who spent much of last year sidelined with injury.
The Ospreys star has made just 11 starts for Wales since 2005 following ankle and Achilles trouble, although started in all of Wales' Grand Slam games of 2005 and 2008.
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.