Some of FIFA's rules on player transfers go against European Union laws and free movement principles, the EU's top court said on Friday in a ruling that could open the door for players to find a new club more easily after their contract is terminated.
FIFA's Regulations on the Status and Transfer of Players (RSTP) say a player who terminates a contract before its term "without just cause" is liable to pay compensation to the club and where the player joins a new club they will be jointly liable for payment of compensation.
The Court of Justice of the European Union (CJEU), ruling on a high-profile case linked to former France international Lassana Diarra, stated these dispositions were unlawful and the judgment is expected to prompt FIFA to revamp its transfer regulations.
"The rules in question are such as to impede the free movement of professional footballers wishing to develop their activity by going to work for a new club," said the Luxembourg-based CJEU.
"Those rules impose considerable legal risks, unforeseeable and potentially very high financial risks as well as major sporting risks on those players and clubs wishing to employ them which, taken together, are such as to impede international transfers of those players."
In 2014, Diarra left Lokomotiv Moscow one year into a four-year deal and the club took the matter to FIFA's Dispute Resolution Chamber (DRC), arguing he had breached the rules when his contract was terminated after the player decided to leave without just cause following a pay cut.
Diarra received an offer to join Belgian club Charleroi but the club backed out after FIFA refused to sign the International Transfer Certificate (ITC), preventing the player being registered with the Belgian federation.
Former Lokomotiv Moscow star Lassana Diarra's case could have far-reaching implications in the wider game. /Charly Triballeau/AFP
In 2015, FIFA ordered Diarra to pay tenmillion euros ($11.05 million) in damages to Lokomotiv, prompting the former Chelsea, Arsenal and Real Madrid player to sue the world governing body and Belgian FA for damages before a local court.
The CJEU ruling could also lead other players affected by the FIFA regulations like Diarra was to also seek damages.
"All professional players have been affected by these illegal rules (in force since 2001) and can therefore now seek compensation for their losses," Diarra's lawyers Jean-Louis Dupont and Martin Hissel said in a statement.
"We are convinced that this 'price to pay' for violating EU law will - at last - force FIFA to submit to the EU rule of law and speed up the modernisation of governance."
Meanwhile FIFPro, the main professional soccer players' union, said on Friday that a ruling by the European Union's top court that found some FIFA rules on transfers were going against European law will change the landscape of the sport.
The court "just handed down a major ruling... which will change the landscape of professional football", the union said in a statement following the landmark decision that could shake up the system.
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