Wales fly-half Rhys Priestland could miss the summer tour of South Africa after suffering a knee injury.
Priestland, who started in all but one of Wales' Six Nations matches, was injured in the closing stages of Scarlets' 27-15 win over Cardiff Blues in Saturday's final round of RaboDirect Pro12 matches.
Scarlets coach Simon Easterby told the South Wales Evening Post: "It looked like a medial ligament injury, but it's difficult to assess the severity of it at the moment.
"It was disappointing because Rhys was playing really well. He had set up a couple of tries and just looked like he was enjoying himself out there.
"It is disappointing it happened so close to the end and it could possibly hamper his chances of making the summer tour."
Wales are scheduled to play two Test matches against the Springboks this summer with the first clash in Durban on June 14.
They have already lost captain Sam Warburton, flanker Justin Tipuric and full-back Leigh Halfpenny due to injury.