Scarlets and Wales flanker James Davies is facing up to four months on the sidelines after rupturing ligaments in his knee.
Davies limped off early on during the Guinness PRO14 victory over Benetton earlier this month.
The Scarlets today confirmed that he won't play again until the new year.
Davies made his Wales debut against Italy during the Six Nations and produced two man-of-the-match displays in the series win in Argentina in the summer.
He now faces a race to be fit for the start of the 2019 Six Nations.
It is also another setback for the Scarlets, who have been hit by injuries in the opening month of the campaign.
Already without the Aaron Shingler, who isn't expected to return until the new year, they have now lost another key member of the side that helped the West Walians reach the semi-finals of Europe last season.