Former tennis champ Andre Agassi, admitted in an autobiography that he used Crystal Meth (a methamphetamine in its crystalline form) in 1997 when his career was floundering. In his memoir , "Open: An Autobiography," Agassi, 39, admits to drug use as well as talking about his hair loss and doomed 1997-1999 marriage to actress Brooke Shields.

Andre Agassi had won the Olympic gold medal in the 1996 Atlanta Games, but didn't win a major in 1997, dropping to No. 141 in the rankings. He resuscitated his career in 1998, making the biggest one-year jump into the top 10 in the history of the ATP rankings. The next season, he won the French Open to complete a career Grand Slam, then added a second career U.S. Open title en route to finishing 1999 at No. 1. He went on to win three more Australian Open titles before retiring in 2006. He won more than $30 million in his career, and eight major singles titles. He is currently married to former Grand Slam champion Steffi Graf and they have two children.

In the photo: Andre Agassi and wife Steffi Graf during his 14th annual Grand Slam for Children charity event on September 26, 2009 at the Wynn Casino in Las Vegas.

Andre Agassi & Steffi Graf
Excerpts from his book which comes out November 9, are being published this week in the London newspaper, as well as Sports Illustrated and People magazines.

Some facts about the Crystal Meth:

Crystal Meth sometimes called as ice, Tina, or glass is a highly addictive stimulant. Usually crystal meth is smoked in glass pipes, similar to how crack cocaine is used. It may be injected (either dry or dissolved in water), snorted, swallowed, or inserted into the anus or urethra. Some people take meth because of the long-lasting high that it gives. Methamphetamine causes numerous neurotransmitters to be released in the brain, producing a sense of euphoria that may last as long as 12 hours, depending on how the drug was taken.

Methamphetamine is popular as a stimulant. As a stimulant, methamphetamine improves concentration, energy, and alertness while decreasing appetite and fatigue.