The comments were made by Dick Pound in London on Wednesday
The former head of the World Anti-Doping Agency has admitted that Russian track and field athletes "may not make it back" in time to compete at this Summer's Olympic Games.
Dick Pound was speaking on Wednesday morning at the Tackling Doping In Sport event in London. The Canadian was the author of Independent Commission Report into the state of Russian athletics.
Dick Pound: as we have seen from WADA strong response to latest German documentary, not enough is changing in Russia to re-comply— WADA (@wada_ama) March 9, 2016
The Russian Anti-Doping Agency were suspended last November over non-compliance issues by WADA. The Russian athletics federation was also banned indefinitely from all international competition.
Pound's comments are sure to be another blow to Russian sport. In the 2012 Olympics, Russia won 17 medals in athletics, including eight golds. Only the United States won more.