This is because Brazilian athletes gave a significantly reduced number of samples in the first three weeks of July. The World Anti-Doping Agency said the gap in samples collected by Brazil's anti-doping agency was "unacceptable practice ... particularly at such a crucial time before the Olympic Games." A spokesman for the Brazilian Ministry of Sport, Paulo Rossi, told CNN the Brazilian team of 477 athletes gave a total of 110 samples in the first 24 days of July. The host nation has already been sanctioned by the World Anti-Doping Agency, or WADA, over concerns its testing of its own athletes ahead of the Games was delayed, and perhaps compromised. Yet CNN has learned there may not actually be enough samples to test to give the team -- the second largest at the games -- a clean record for July.

Source: CNN August 08, 2016 00:56 UTC