Coach Steve Hansen has gone out on a limb to be fully fit for Wales' World Cup campaign next month.
The New Zealander went under the knife on Monday as an old rugby injury flared up during the team's pre-Cup warmup in Lanzarote.
"It's an old knee injury which has been playing up for about six months," team manager Alan Phillips said. "It's a cartilage thing - they just went in there and cleaned it up. He was in and out on the same day."
Phillips said there were no serious injuries among the 30-man squad, although there was "plenty of fatigue and the odd ankle strain".
"They really put the work in over there, fair play to them," the former Wales hooker said.
"There are a lot of tired bodies in the team."
Phillips said it was too early to say if all 30 players would take part in a training match at the Millennium Stadium on Wednesday.
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.