Russia and Kenya vowed to meet the unprecedented anti-doping requirements placed on their Rio 2016 hopefuls by the International Olympic Committee (IOC).
Officials from both countries gave diplomatic responses to the IOC's announcement on Tuesday that their prospective Olympians, in all sports, would have to pass individual assessments before being declared eligible to compete.
The measure was unanimously agreed at an emergency summit convened by the IOC in Lausanne.
With the World Anti-Doping Agency (WADA) declaring both Kenya and Russia "non-compliant", IOC president Thomas Bach said athletes from those countries could no longer be "presumed innocent".
"We respect the statement made by the International Olympic Committee and fully support its zero tolerance approach to doping," said a statement from the Russian Ministry of Sport.
"Our Olympians are ready to go over and above all the normal anti-doping tests to show their commitment to clean and fair sport. We look forward to working closely with the international federations to determine how to assess eligibility."
Jackson Tuwei, the president of Athletics Kenya, said: "We have nothing to fear. If that is the requirement for us to go to Rio, we shall fully cooperate. We have always done our best in the fight against doping."
The conciliatory nature of Russia's statement, particularly when compared to earlier messages of defiance, suggests they realise the IOC could have been much tougher on them given the mounting evidence of state-sponsored cheating in recent years.
It is also telling that the Russian media has focused on Bach's comments that any Russian track and field athlete in Rio will be able to compete in Russian colours and under a Russian flag.
That is contrary to what the International Association of Athletics Federations (IAAF) decided on Friday, when it voted to maintain the ban on Russia's athletics federation imposed after a WADA investigation in November.
The IAAF left "a crack in the door" for a small number of Russian athletes who can demonstrate a clean record from credible testing agencies. But it was clear that those athletes should be in neutral colours, under an IOC flag.
The IAAF reacted to the IOC announcement by saying it would now "work with the IOC to ensure (Friday's) decision is respected and implemented in full".
Speaking after the summit, Bach said representatives from across the Olympic movement had unanimously backed the IAAF decision, only to then say Russian athletes could wear Russian colours as they were representing the Russian Olympic Committee (ROC), not the Russian athletics federation, and the ROC was not banned.
On the subject of the "individual assessments", Bach said: "The conclusion of the summit was that this non-compliance declaration, and the substantial allegations related to it, put very serious doubts on the presumption of innocence for athletes coming from these two countries.
"Therefore, each athlete coming from these two countries will have to be declared eligible by their respective international federation following an individual procedure and evaluation of the situation.
"Tests from laboratories that are tainted or non-compliant cannot be taken into consideration.
"The respective (international federation) will have to take into account other reliable tests, that means international tests, or tests supervised by international authorities."
