After devoting years to the difficult pursuit of perfection, some fall wayward.
The WADA report also identified "systematic failures" at the IAAF, athletics' world governing body, which has been rocked by a French judicial investigation into fraud involving its former chief Lamine Diack and other senior officials.
American swimmer Michael Phelps, the most decorated Olympian of all time, said on Tuesday he hopes this year's Rio Olympics can help heal a sports world hit by recent doping and corruption cases.
Russia claimed the IAAF's decision to continue its ban of Russian athletics on Friday was unfair and threatened legal action, while the rest of the world welcomed the move and urged the IOC not to go against it.
A summary of sports events and persons who made news on Saturday
Summary of sports events and persons who made news on Tuesday
Summary of sports events and persons who made news on Tuesday