Wales fullback Leigh Halfpenny will miss the start of the upcoming Six Nations campaign after failing to make sufficient recovery from a concussion.
The 30-year-old has been out of action since he suffered the blow during the autumn international clash against Australia on 10th November when he was charged by Samu Kerevi.
After complaining of headaches, Halfpenny decided to consult a specialist and has been advised three to five weeks of rest which makes him doubtful starter for Wales' Six Nations campaign.
The news was confirmed by Scarlets head coach Wayne Pivac.
"Leigh has seen the specialist and won't be used for the next three to five weeks," said Pivac.
"He'll continue training and doing what he's been doing, and then he will be reassessed
"It will be somewhere between three to five weeks, but these things take time.
"We will pass on the medical information to the Welsh Rugby Union. That will then be Warren's call as to what he does because the tournament runs for longer than that.
"He's running, he's training, and from time to time I think he's been having bouts of headaches.
"He's as frustrated as anybody is, but his health and wellbeing comes first".
Wales will kick-start their Six Nations campaign with a clash against France on 1st February in Paris.