Russia earned the right to host the 2018 World Cup honestly and fairly, according to the country's president, Vladimir Putin.
Swiss authorities revealed last month that they had opened an investigation into the FIFA votes that resulted in the next tournament being awarded to Russia and the 2022 edition going to Qatar.
The announcement was made on the same day that several members of football's governing body were arrested as part of an FBI-led inquiry into alleged bribery dating back to 1991.
The head of FIFA’s auditing and compliance committee, Domenico Scala, has since stated that if there was any corruption involved in the bidding or voting process for the next two World Cups, the chosen hosts could be stripped of the event.
However, Putin insists that Russia 2018 is secure, stating that the country has nothing to hide.
"If anyone has evidence, let them present it," he said. "We won in a fair fight and are going to host the World Cup.
"We fought in an honest manner [for the tournament] and we won. We do not think the decision should be questioned. We were ready and that’s what convinced FIFA. The stadium construction has already started."
Former FIFA vice-president Jack Warner has already been accused of accepting a bribe in exchange for his support for South Africa's ultimately successful bid for the 2010 World Cup.
Swiss authorities have also confirmed that their investigation into the next two tournaments has already detected suspicious activity in more than 100 bank accounts.