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    Andre Agassi, 1997

    Tennis players are notable for being a particularly driven lot. The directness of competition on the court demands constant attention and steely reserve. So nobody was terribly surprised when  Andre Agassi copped to doing crystal meth for about a year. Agassi, the eight-time Grand Slam champion nicknamed “The Punisher,” was at a career low in 1997.

    A nagging wrist injury caused him to play only 24 games that year, and a friend got him hooked on crystal meth. When he failed a drug test that year, he blamed his assistant, claiming that “Slim” would regularly spike his Coca-Cola with meth and Agassi accidentally drank one. Needless to say, this was total BS, but as an excuse it was enough to fool the Association of Tennis Professionals.