In an open-letter addressed to his fellow countryman, Prokop urges the IOC to back-up their claims that clean athletes are the priority by taking action against those from all countries who do not have a compliant out-of-competition testing programme.

To not do so would be a "betrayal of athletes, but also a betrayal of the IOC and the Olympic ideals", he claims.

This comes with exactly a week to go until the International Association of Athletics Federations (IAAF) Council meeting in Vienna at which a decision on whether to lift the suspension of the All-Russia Athletic Federation (ARAF) will be made.

But the IOC have now arranged an "Olympic Stakeholder Summit" just four days later in Lausanne, which is seen by many as an opportunity to find a way to enable Russian athletes not implicated in doping scandals to compete in Rio.

Prokop does not specifically call for the ban on Russia to be maintained, but this is strongly implied throughout his letter.

"It appears that some leaders in the world of sport contemplate - in the case of an exclusion [by the IAAF] - to grant Russian athletes eligibility for the Olympics in Rio provided they have not been tested positive for doping substances," he writes.

"It is obvious that the IOC's announcement to double the number of doping controls prior to Rio and in particular to have them carried-out in countries like Russia and Kenya has to be seen in light of the above."

He continues by pointing-out how the main benefit of doping comes in out-of-competition training periods, such an "in autumn 2015" and "spring 2016".

"Thus, a level playing field in Rio requires that a deterrent doping control system was operational during these relevant periods," he adds.

Prokop asserts that the periods currently ongoing immediately preceding the Games are far less important in benefiting the performances of athletes during the event, meaning "any anti-doping measures being introduced today are inept from the outset to compensate for the long-term structural deficits and shortfalls in the fight against doping".

"Such activities in athletics will, therefore, never restore the level playing field in athletics," he said.

This can be interpreted as a direct attack on the almost-daily insistence by Russian authorities that they have changed their culture and improved their doping systems.

It also criticises the claim, uttered by many sporting administrators in recent months, that "clean athletes" from Russia would be unfairly punished if the ban remains in place.

The IOC have duly vowed to distinguish between "individual action and collective responsibility" during their Lausanne meeting.

Prokop is effectively adopting a "guilty until proved innocent" approach where there is an assumption of wrongdoing on all those in countries where there is not an effective testing system in place to prove they are clean.

"Should athletes from countries [with improper doping systems] be allowed to compete in Rio, DLV athletes see their right to equal treatment and equal opportunity blatantly violated, because there is no reassurance whatsoever that their competitor has not used prohibited substances [at previous times]," Prokop continues.

"Dear Mr. President, you are often quoted as saying: 'Protecting clean athletes has priority'.

"The recent findings regarding the 2008 and 2012 Olympic Games have shown that the principle of equality of opportunity has not always been enforced.

"This not only constitutes a betrayal of athletes, but also a betrayal of the IOC and the Olympic ideals.

"Therefore I kindly ask you to take athletes' concerns seriously and to use all possible means for ensuring fair competitions and equality of opportunity in Rio.

"We all owe this to the athletes."

Prokop, who failed in an attempt to be elected to the IAAF Council last year, is a colourful figure who claimed in 2014 that the Olympic Games should be awarded to whole countries rather than single cities.

But his words will still come as a blow to Bach, who is trying to play a delicate balancing act between justice and maintain a diplomatic relationship with Russia.

Bach enjoys a particularly close friendship with Russian President Vladimir Putin, from whom he received a congratulatory phone-call immediately after he was elected President in September 2013 shortly before the Winter Olympic Games in Sochi.

The open letter can be read in full here here.