Russian Premier League clubs FK Krasnodar and Krylya Sovetov have refuted accusations that Samara's 3-0 win on Saturday was fixed, insisting the claims are "outrageous and insulting".
Reports of potential interference in the match surfaced after relegation-threatened Samara eased to victory over their eighth-placed opponents.
The win moved Samara to within three points of safety, although the Russian Premier League moved quickly to deny the media speculation.
"Lately, we have seen an increase of unfounded allegations in the media. Unfortunately, often they are initiated by certain members of our football family," the league said on its website.
"We ask all our members to respect each other. At the same time refrain from making rush conclusions which would harm the reputation of our clubs, the Russian FA and the Premier League."
The clubs released a joint statement on their websites, which read: "We believe this is a pure smear campaign, not only against the two clubs but the entire Russian football."
Samara boss Denis Maslov appeared disgruntled by the comments directed at his club, claiming there is no amount of money that could persuade Krasnodar's billionaire owner Sergei Galitsky to fix the match.
"Such allegations are outrageous and insulting," Maslov said. "What do you think we could offer Sergei Galitsky so he would agree to give us a win?"