A spokesman for Sepp Blatter has confirmed that "behind-the-curtain talks" took place prior to Russia being awarded the 2018 World Cup.
The suspended FIFA chief revealed earlier this week that an agreement was in place to see the Eastern European nation host the tournament, prior to a vote even taking place.
Blatter also claimed that the United States were due to be named as host country for the 2022 edition of the competition, until UEFA chief Michel Platini - himself under an ongoing investigation into corruption - intervened and voted for eventual winners Qatar.
Attempts had been made to play down Blatter's revelations, but advisor Klaus Stoehlker has all but confirmed the departing FIFA boss's claims.
Speaking to PA, he said: "Before the decision was taken, in the case of Russia and the USA, there were 'behind-the-curtain' talks. It was not everyone in the FIFA executive committee but it was the big players that had these talks."
When asked if it was fair on Russia's direct competitors, Stoehlker added: "That is a good question - but there is a saying that fairness is only between equals. I think the rivals of Russia, including England, are not content with this pro-Russia decision."
Both Blatter and Platini have denied any wrongdoing over claims of widespread corruption at the top level of football's world governing body.