Nantes' appeal to the Court of Arbitration for Sport over their FIFA-imposed transfer ban has been rejected.
Nantes, who were promoted to Ligue 1 at the end of the 2012-13 season, were barred from signing new players in the next two transfer windows after FIFA determined they had broken rules when recruiting Guinea striker Ismael Bangoura from Al Nasr Sports Club of Dubai in January 2012.
The eight-time French champions challenged the verdict from FIFA's dispute resolution chamber which also made Bangoura and Nantes jointly liable to pay Al Nasr compensation of 4.5million euros (£3.9million) over breach of contract.
However, the Court of Arbitration for Sport (CAS) today confirmed it has dismissed the appeal by Nantes, Bangoura and Al Nasr Sports Club.
It said in a statement: "The three appeals have been dismissed and the decision of the FIFA Dispute Resolution Centre has been confirmed in its entirety.
"Therefore, amongst others, FC Nantes remains banned from registering any new players for the next two transfer windows."