The world players' union has warned players off moving to Serbia.
FIFPro, the world players' union, and the Serbian players' union have warned players of severe financial problems in Serbian football, with eight of the 16 teams in the countries SuperLiga unable to pay employees after having their bank accounts blocked by the Serbian national bank.
"We hate to do this, but it is our job to protect the players", FIFPro secretary general Theo van Seggelen said in a statement.
"Players haven't been paid for months and encounter serious financial problems. Clubs are on the verge of going bankrupt.
"On top of that, I received the shocking news that one of the clubs totally disrespects the players' rights and even allows hooligans to threaten their players."