Stade Francais have refused a request to make Will Genia available for Australia's Test against England on Saturday, according to Wallabies coach Michael Cheika.
The clash at Twickenham falls outside the official November fixture window, meaning the Top 14 club are not obliged to allow the scrum-half to skip his domestic duties.
Cheika claimed the Australian Rugby Union (ARU) will persist with their attempts to secure the services of the 28-year-old former Reds player, but seemingly with little optimism.
"Right now, from the conversations we've had with Paris, they're not releasing him," he said.
"We'll have another crack and see what we can do.
"It seems unlikely, the French place more importance on their game for Will than our internationals, that's the way the rules are and we'll just have to deal with it."
The Wallabies lost 27-24 to Ireland in Dublin on Saturday to give up what had been a 100 per cent record in their northern hemisphere tour, having beaten Wales, Scotland and France.
The match this weekend offers an opportunity for the visitors to gain revenge after they were whitewashed 3-0 by England, with former Wallabies coach Eddie Jones at the helm, on home soil in June.