NEW YORK – Andre Agassi’s upcoming autobiography contains an admission that he used crystal meth in 1997 and lied to tennis authorities when he failed a drug test – a result that was thrown out after he said he “unwittingly” took the substance.

According to an excerpt of the autobiography posted on The Times of London Web site Tuesday, Agassi writes that he sent a letter to the ATP tour to explain the positive test, saying he accidentally drank from a soda spiked with meth by his assistant.

Agassi writes: “The ATP reviewed the case – and threw it out.”

The ATP did not immediately respond to a request for comment.

Excerpts from the book are being printed this week by People and Sports Illustrated. A writer from SI first revealed the crystal meth reference on a Twitter posting Tuesday.

Knopf is publishing the book Nov. 9.