Wales and Cardiff Blues centre Jamie Roberts looks set to miss the next six weeks of rugby after injuring his elbow.
Roberts hyper-extended the joint during Wales' 14-12 loss to Australia last weekend and is scheduled to see a specialist.
He is expected to miss the Blues' remaining European Cup pool fixtures against Montpellier (home and away), Toulon and Sale Sharks.
The injury will also hinder Roberts' preparations for the Six Nations, with Wales due to begin their title defence against Ireland at the Millennium Stadium in Cardiff on February 2.
Roberts only recently returned to international duty after a long period out of action following surgery on his knee.
Cardiff also revealed that Leigh Halfpenny is being watched closely by the team's medics as he sufferd a severe stinger in Wales' match against Australia
Meanwhile Michael Paterson fractured little finger against Ospreys and is also expected back in around six weeks after having surgery on Thursday.