SPORT

Boxer <n>Muhammad Ali</n> after knocking out <n>Sonny Liston</n> in their 1965 title fight. Photo by <n>Neil Leifer</n>.

<n>Mike Tyson</n> before his 1999 fight against Francois Botha. Photo by <n>V.J. Lovero</n> for <n>Sports Illustrated</n>.

<n>Bruce Lee</n> on the set of the film <n>Enter the Dragon</n> in 1973. Photo by <n>Warner Bros.</n>

<n>Kobe Bryant</n> for <n>Nike</n>'s <n>Mamba Day</n> campaign in 2016.

<n>Muhammad Ali</n> stands over a fallen <n>Cleveland Williams</n> in 1966. Photo by <n>Neil Leifer</n>.

<n>Robert De Niro</n> as boxer <n>Jake LaMotta</n> in <n>Martin Scorsese</n>'s 1980 film <n>Raging Bull</n>.

Boxer <n>Mike Tyson</n> after his 1996 title fight against Frank Bruno. Photo by <n>Alan Davidson</n>.

<n>Michael Jordan</n> during his 69-point game for the <n>Chicago Bulls</n>, March 28, 1990. Photo by <n>Getty Images</n>.

Boxer <n>Muhammad Ali</n> photographed by <n>Flip Schulke</n> for <n>Life</n> magazine in Miami, 1961.

<n>Michael Jordan</n> celebrates the <n>Chicago Bulls</n>' 6th NBA Championship win over the <n>Utah Jazz</n> in 1998.