The "Fight of the Century"
In 1910, former undefeated heavyweight champion James J. Jeffries came out of retirement and said, "I feel obligated to the sporting public at least to make an effort to reclaim the heavyweight championship for the white race. . . . I should step into the ring again and demonstrate that a white man is king of them all." Jeffries had not fought in six years and had to lose weight to get back to his championship fighting weight.
The fight took place on July 4, 1910 in front of 20,000 people, at a ring built just for the occasion in downtown Reno, Nevada. Johnson proved stronger and more nimble than Jeffries. In the 15th round, after Jeffries had been knocked down twice for the first time in his career, his people called it quits to prevent Johnson from knocking him out.
The "Fight of the Century" earned Johnson $65,000 and silenced the critics, who had belittled Johnson's previous victory over Tommy Burns as "empty," claiming that Burns was a false champion since Jeffries had retired undefeated.
Wikipedia