The Professional Footballers' Association has said it is doing everything possible to resolve Newcastle striker Papiss Cisse’s sponsorship dispute with the club.
Cisse, 28, has refused to wear any shirt bearing the name of the Magpies' new sponsor, the money-lending firm Wonga, because of his Muslim faith.
On Wednesday, a photograph emerged of the striker at a poker table in a casino as the row rumbled on.
As the Magpies headed to Portugal for a pre-season tour, Cisse was left to train alone on Tyneisde and has been linked with a move to Russia.
PFA chief executive Gordon Taylor, however, said he hoped a resolution could be found and told Sky Sports: "We're working with Newcastle United, Papiss and his advisor to achieve a satisfactory settlement.
“We're consulting experienced people within football, used to dealing with equality issues, who are Muslims."