100-metre record holder Asafa Powell has said that he expects to run against drug cheats at the 2008 Beijing Olympics.

“I have a lot of suspicions but I keep them to myself,” Powell told Melbourne’s Sunday Herald Sun newspaper.

“It’s always going to be there, that dark cloud, because people are wondering who is really on drugs.

“It’s a very unfair sport. I get my satisfaction from beating whoever I think is on it.

Around half of the 11,000 Olympic athletes will be tested during the Games.

Read more: 100-metre record holder Powell expects to run against drug cheats in Beijing