This follows a report by the Daily Mail that claimed FIFA were investigating 34 Russian players, who were suspected of potential breaches.

It was claimed the investigation included the entire Russian squad for the 2014 FIFA World Cup in Brazil.

The FIFA investigation reportedly stems from findings by Canadian lawyer Richard McLaren, which claimed that more than 1,000 Russians from a number of Summer and Winter Olympic, non-Olympic and Paralympic sports had been involved in the manipulation of doping samples.

This included many cases of tampering where samples were illegally switched for fake clean ones.

During a press conference alongside Russia’s Deputy Prime Minister Vitaly Mutko, Infantino claimed he does not know how long it will take for FIFA's investigation to conclude.

However, the 47-year-old announced that all Russian players tested by FIFA in Brazil three years ago were all found to be negative.

He added that the same applied to last year's European Championships in France, where UEFA were in charge of testing.

"These tests are not done in Russia," Infantino added.

"It's all done outside Russia in World Anti-Doping Agency-accredited laboratories and they have given negative results.

"These are the facts that need to be remembered.

"We have all seen the different reports, we are collecting information and if there have been any anti-doping violations, measures will be taken.

"We always have a zero-tolerance policy for doping."

Mutko, who heads the Russian Football Union, described the allegations as "nonsense" on June 27 and once again reiterated his stance in a sarcastic tone at the press conference.

"If I perform a Russia dance here in front of you, will you stop asking?" he said to reporters.

"I don't know how to react to this.

"We are investing a lot of money into sports and we don't need doping to win a bronze medal that doesn't mean much.

"We have never been supporting people who are using doping."

Two International Olympic Committee investigations are currently ongoing to assess McLaren Report evidence, which primarily looked at the Sochi 2014 Winter Olympics.

Similar investigations are also being carried out in a number of sports.

FIFA’s reported investigation comes as Russia are hosting the 2017 Confederations Cup, with five members of the country’s team claimed to have been implicated.

Russia failed to get out of their group in the tournament, which is being used to build-up to next year’s World Cup in the country.

Germany defeated Chile 1-0 in the final at the Krestovsky Stadium in Saint Petersburg on Sunday (July 2).