Jim Courier: "There’s not a part of me that thinks these guys are doing anything illegal."
Jon Wertheim: "When you declare a contemporary athlete clean, you do so at your own peril. But it’s not just unlikely that a top tennis player’s success or muscles or stamina is the product of anything other than genetics and industriousness. It’s damn near impossible."
Charles E. Yesalis, a professor of sports science at Penn State University: "Testing catches the careless and the stupid...If you believe only 1 to 2 percent use drugs, that is incredibly naïve. Drug use is the greatest problem facing elite sports, and testing creates the facade that everyone is clean...The major breakthroughs have come from law enforcement, not by any testing. Testing is there to provide the fan, who is already disinterested in drug use, with plausible deniability because the leagues tell the fans the athletes are clean because they have drug testing."
Yesalis: "These guys (professional athletes) hire scientific handlers, the serious ones. Most of them don’t do cowboy chemistry. They don’t look on the Internet and do it themselves [...] If you get a good chemist and you know the frailties of the test you could use the stuff [HGH]."