Court of Arbitration for Sport (CAS) has registered an appeal by the Chilean football federation (FFCH) against FIFA's decision to allow Ecuador to play at the World Cup despite allegations they fielded an ineligible player, it said on Friday.
World governing body FIFA earlier this month dismissed an appeal in the case of Ecuadorean player Byron Castillo, who Chile had alleged was ineligible to play in qualifying since he was born in Colombia.
Castillo played in eight of Ecuador's qualifying games - including twice against Chile - for the Qatar World Cup as they took fourth place, while Chile finished seventh.
Ecuador have denied that the player was ineligible. CAS said it had also accepted an appeal by the Peruvian football federation (FPF).
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