FIFA has yet to receive evidence of match-fixing at the World Cup and have demanded proof of allegations about Cameroon.
Former Cameroon player Francois Omam-Biyik has dismissed fixing claims involving the national team at the World Cup.
FIFA has refused to comment on whether an investigation is under way into allegations of match-fixing against Cameroon.
Cameroon are investigating after allegations of match-fixing were made against seven players at the World Cup.
Brazil will face Chile in the World Cup's round of 16 after Neymar's double helped secure a 4-1 win over Cameroon.
Volker Finke says his Cameroon side are "suffering" after their woeful World Cup campaign ended in a 4-1 loss to Brazil.
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