Welsh Rugby Union head of performance Geraint John says Scarlets' James Davies could miss their 2018 Commonwealth Games campaign.
Flanker Davies, 25, was a key player for Team GB rugby 7s who won a silver medal at the 2016 Rio Olympic Games.
But the Commonwealths will be held on Australia's Gold Coast on 4-15 April, during the rugby season.
"It will be difficult for James because it's the middle of the season," said John.
"It's different to the Olympics which was at the end of the season.
"If James became available [Wales 7s coach] Gareth Williams would take him like a shot. He is an outstanding player with sevens and 15-a-side pedigree.
"We know that [Scarlets head coach] Wayne Pivac and the Scarlets will want to continue the success after winning the Pro12 title.
"So it would be doubtful James would be available for the Commonwealth Games.
"We hope to have a more experienced Sevens squad than we have had before.
"Gareth Williams is in discussions with the regions about what players could be available and added to the squad nearer the time as well.
"We want to see which players might benefit from being at the Commonwealth Games and Gareth has an excellent relationship with the regions."
John believes Wales can finish on the podium in Australia next year.
"The aim is to medal," said John.
"That is majorly difficult because the Commonwealth Games is as close to a world tournament as you can possibly get.
"Last time in Glasgow, Wales lost right at the death in the quarter-finals to Australia who I was coaching.
"The aim now is to go the other way and we have developed a lot of players over the last 24 months."
Quotes from BBC Sport