Huw Bennett is set to return to action in mid-January. after suffering a fresh setback in his recovery from an ankle injury.
The Wales and Ospreys hooker had hoped to return for his region's clash with the Scarlets on 27 December. But Bennett has been told he is now unlikely to overcome a ligament problem until the middle of next month.
"It's been four weeks so far, it's just a question of looking after it really, it's a ligament injury so the less I do on it the better," he said. "It's not like a bone injury when they can tell you exactly when you're back, it's just resting it and taking it week-to-week."
Bennett missed the whole of the Invesco Perpetual Series after suffering his injury during the Ospreys' EDF Energy Cup defeat at London Irish on 2 November.
It was an unrelated ankle problem that forced him out of Wales' tour of South Africa in the summer after he had played a major role in the Grand Slam success of last season.
"Now it's just the focus of getting fit and getting back for the Ospreys and hopefully earn selection for the Six Nations," Bennett added.
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.