Legendary boxer Joe Frazier who beat Muhammad Ali in the "Fight of the Century" in 1971, died Monday after a long battle with liver cancer.

Frazier died late Monday at his home in Philadelphia, Pennsylvania, his family said in a statement. He was 67.

"We thank you for your prayers for our father and vast outpouring of love and support. Respectfully, we request time to grieve privately as a family. Our father's home going celebration will be announced as soon as possible. Thank you for your understanding," the family's statement said.

Frazier a.k.a. "Smokin' Joe" was diagnosed with cancer in October, the family's spokesman Darren Prince told Bloomberg.

Frazier became the undisputed heavyweight champion in 1970 when he knocked out Jimmy Ellis at a fight at Madison Square Garden. Later in 1971 he defended his title against Ali in the "Fight of the Century" since both boxers entered the fight undefeated.

In 1973 he lost his title to George Foreman and later was defeated by Ali in two rematches. In 1981 he made a brief comeback.

Watch below a knockdown in the 'The Fight of the Century':