USOC chair says it will be 'incredibly difficult' for Russian athletes to show they're clean

Russia was still manipulating test data from Moscow lab in January 2019, making it impossible to bring doping cases against as many as 145 athletes       

USOC chair says it will be 'incredibly difficult' for Russian athletes to show they're clean
Russia was still manipulating test data from Moscow lab in January 2019, making it impossible to bring doping cases against as many as 145 athletes