Journals kept by the former chief of Russia's anti-doping lab are being used as evidence in a case that will determine the fate of the country's Winter Olympics team.
As the International Olympic Committee (IOC) hands down a life ban to a further three Russian athletes, the New York Times has published the so-called Doping Diaries of a chemist who allegedly helped Russians to cheat in the Games.
The journals will be used as key evidence in a case against Russia that could see the team barred from competing in the 2018 Winter Games in South Korea.
Grigory Rodchenkov chronicled his daily life between 2014 and 1, which were his final years as the chief of Russia’s anti-doping lab.
He reportedly helped numerous Russian athletes to gain an advantage by using illegal substances, before fleeing to the US two years ago.
Rodchenkov claims Olympic officials were among those involved in elaborate state-sponsored cheating.
Russia denies the allegations, saying it is a victim of a politicised dirty trick campaign.
A decision is due on December 5, 2017.