Wales captain Sam Warburton will see a specialist today in an attempt to gauge the extent of a shoulder injury that forced him off during Saturday's Grand Slam clincher against France.
It was his third different injury of this season's Six Nations following earlier thigh and knee trouble that contributed to him playing just 160 minutes from a possible 400 in the championship. Warburton has already undergone an MRI scan, but that proved inconclusive.
"Not much showed up on it," he said. "There is a bit of concern because I am still in quite a bit of discomfort.
"I am seeing a specialist tomorrow, and I will find out more then. The MRI scan did not show any soft tissue damage.
"It may be that it is more complicated than that, such as something to do with nerves, which would not have shown up.
"I do not know what to think -- it could be two weeks, or it could be two months.
"One of the reasons they are finding it difficult is that I cannot recall the incident in the game when it happened. If the physios knew when it happened then they could look at the video and see what sort of collision it was and what might have happened to the joint."
Warburton confirmed it is not the same shoulder that he had reconstruction surgery on three years ago, but he admitted it had been a deflating experience leaving the action at half-time before Wales went on to secure a 16-9 success that gave them their second Six Nations title and Grand Slam of coach Warren Gatland's four-year reign.
"I was embarrassed not to be able to play in the second half, as well as shattered. It was the biggest game of my career," he added.
"I felt guilty lifting the trophy because I could see the state of some of the players. Their bodies were hurting because they had tried so hard.
"We deserved the Grand Slam for how hard we have worked since last June. It was our just reward."