The 2022 FIFA World Cup gets underway in November, but one South American nation could potentially be thrown over an alleged ineligible player.
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The Chilean football Federation has written to world football governing body FIFA to investigate a claim that midfielder Byron Castillo is not eligible to represent Ecuador.
The complaint was made a month after the South American qualifiers finished, where Ecuador finished fifth in qualifying table while Chile finished in seventh.
The Chilean FA claim that Castillo is actually Colombian and is therefore not eligible to represent La Tricolor.
'FIFA can confirm that it has received a formal complaint from the Chilean FA in relation to this matter,' football's governing body said in a statement.
In 2018, Bolivia had to forfeit two qualifying games after fielding an ineligible Paraguay-born player as a late substitute, while they also lost their appeal at the Court of Arbitration for Sport.
Ecuador were recently drawn in Group A alongside hosts Qatar, Netherlands and Africa Cup of Nations Senegal.
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