Scarlets will miss the services of James Davies for three months as the openside flanker is set to undergo a surgery on his shoulder.
The 26-year-old suffered the blow during the previous season and will go under the knife on Friday.
The news was confirmed by a statement released by the Welsh regional side.
"The surgery is to repair damage sustained to his shoulder last season and will keep him sidelined for 12 weeks," read the statement.
"Despite initially trialing a period of rehabilitation, the injury hasn't improved to the level required to function and cope with the demands of competition, and therefore requires Davies to go under the knife."
Davies, who represented the GB Sevens at the Rio Olympics was a contender for the Wales squad in the upcoming autumn internationals but now will have to undergo a lengthy rehabilitation period.
Wales will take on Australia, Georgia, New Zealand and South Africa in their autumn internationals that begins on 11th November.