Ospreys back rower Tom Smith has been ruled out for up to eight weeks after picking up hip and knee injuries during the recent Magners League win over Connacht.
The 24-year-old was forced off early on in the 19-17 win on the 21st February, and scans have shown the extent of the damage.
Ospreys Physio Chris Towers confirmed: "Tom has torn muscles in his hip, as well as damaging knee ligaments. He is improving as well as we could hope for at the moment, but we are looking at a recovery period of around six to eight weeks from the day of the game, which means that we are looking at a mid-April return to playing."
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.