The Ospreys are hopeful Adam Jones will be available for their New Year's Day game against Cardiff Blues.
The Wales prop sustained a neck injury during the Ospreys' 22-14 Pro12 Boxing Day defeat by the Scarlets.
Ospreys head physio Chris Towers said the 30-year-old had suffered a minor muscle spasm.
"We remain hopeful about his prospects of being available for selection subject to him undergoing a fitness test later in the week," he said.
Jones has been absent for Wales' last two Tests, having come off with a calf injury early on in in their 9-8 World Cup semi-final defeat by France.
Wales have since lost twice to Australia in the renowned scrummager's absence.
They fell to a 21-18 loss to the Wallabies when the World Cup bronze medal was at stake.
And on 3 December, Jones was absent when Shane Williams made his final Wales Test appearance as they lost 24-18.
Wales head coach Gatland already has a concern over Jones' fellow British and Irish Lion Jamie Roberts.
The Cardiff Blues centre is to undergo a scan to determine the severity of the knee injury he suffered in their 28-9 Pro12 win over Newport Gwent Dragons on Friday, 23 December.