For Usain Bolt, the announcement that 31 athletes have been caught doping in retests from the 2008 Beijing Olympics was "really bad news."
"It's rough. It's rough in the sport," the Jamaican great said on Wednesday.
"Something that's been tarnishing the sport for years."
Bolt was speaking a day after the International Olympic Committee announced that the 31 athletes could be banned from competing at the Rio de Janeiro Games. He said the World Anti-Doping Agency and others "are doing a very good job of cleaning up the sport. They've proven that anybody who has cheated, they're going to catch."
Bolt will run in the 100 metres at the Golden Spike meet in the eastern Czech city of Ostrava on Friday, his first race in Europe ahead of the Rio Games.
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He said he believed that the crackdown on doping could prove successful.
"Hopefully, we can take steps forward in making the sports better and in the upcoming years we won't have these problems," Bolt said.
"But, I think it's a process, and I think over time we will get better because they're doing such a good job."
In track, Russia is banned from competing because of a WADA panel report detailing state-sponsored doping. The IAAF has yet to decide if the Russian track team will be allowed to compete in Rio.
