On Friday, FIFA doping control officers visited Russia's training camp in Austria, and took samples from all 28 players in the preliminary squad.

"No, absolutely not," Cherchesov said, when asked whether he was bothered by the doping tests.

Cherchesov added that he completely understood that visits from the doping control teams should not be announced in advance, though he did stress it would be better if they did not arrive early in the morning, as this would still not affect whether the results would be positive or negative.

"I don't really understand it - and I've already mentioned it - when they come at six in the morning while they could do it at, say, nine [o'clock]? In the end, if you have something [in your system] at six, it won't go anywhere by nine," Cherchesov said.

The head coach also said that the team never had problems with following the doping control officers' requests and instructions as it was part of their job.

The Russian squad are currently training in the Austrian town of Neustift ahead of their pre-World Cup friendly with Austria in Innsbruck on May 30, and will head back to Russia on May 31.

Russia will host the FIFA World Cup from June 14 to July 15, with the games set to be played at 12 arenas in 11 cities.