Wales back Hallam Amos is expected to be sidelined until the New Year after suffering a shoulder injury in last weekend's 32-8 defeat by Australia in Cardiff.
The 22-year-old was released from Wales' autumn Test squad on Tuesday.
He was hurt during the second-half of Wales' 32-8 defeat by Australia in Cardiff last weekend.
Amos, who has won 11 caps, impressed after going on as a substitute before injury struck in the second half last weekend.
In an injury update posted on the official Newport Gwent Dragons website, Amos' regional team said he would now undergo surgery.
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"Having been reviewed by a specialist, he will undergo surgery next week," the Dragons said.
"Amos will then require a period of rehabilitation, with an expected return to play in the New Year."
With Amos sidelined, Wales have called 18-year-old uncapped Ospreys wing Keelan Giles into their autumn squad ahead of remaining November games against Argentina, Japan and South Africa at the Principality Stadium.
