FIFPro says its 2016 global survey found 68 percent of all players in Serbia have their salaries delayed, and 89 percent of those who moved to their clubs for a fee "were pressured into the transfer."

"...professional football players in Serbia who are now effectively playing in a lawless environment,” FIFPro General Sec Theo van Seggelen — Francis Awaritefe (@FrancisAwartefe) January 4, 2017

Now, FIFPro says, things are getting even worse.

It says Serbia's football association removed the representatives of players from a body that deals with their disputes with the clubs and appointed officials linked to major local teams to its top two positions.

“This is a flagrant violation of the fundamental rights of the professional football players in Serbia who are now effectively playing in a lawless environment,” FIFPro General Secretary Theo van Seggelen said.

“We call upon the Serbian Football Association to immediately reverse its decision.

“Until this situation is resolved we strongly advise players not to go and play football in Serbia.”