Ali, Louis and Marciano: Who makes the five greatest heavyweights of all-time list?
Following claims that Tyson Fury is one of the greatest heavyweights of all-time, we take a look at five fighters who could argue otherwise.
Elsewhere, Muhammad Ali is the only heavyweight to have won the lineal title on three occasions while Tyson Fury, Lennox Lewis, Floyd Patterson, Evander Holyfield and George Foreman have earned the status twice.
"Big George" is the oldest heavyweight world champion at the age of 45 while 'Iron' Mike Tyson is the youngest at 20. As it stands, Fury is the lineal champion and between him and unified king Oleksandr Usyk - they own the heavyweight division with the WBA, WBC, IBF, WBO, Ring Magazine and lineal straps.
To celebrate boxing's most popular division - after Fury made a second successful defence of his title against Dillian Whyte - Planet Sport takes a look at the five best heavyweights of all-time. If you disagree, tweet us your top five @planetsportcom.
5) Rocky Marciano
Rocky then made six successful defences, including a first-round KO against Walcott and two wins over Ezzard Charles. His 49-0 record - which ended with a win over Archie Moore - was finally beaten in 2017 when Floyd Mayweather defeated Conor McGregor to go 50-0.
4) Jack Dempsey
William Harrison 'Jack' Dempsey - known as the "Manassa Mauler" - had a seven-year reign as heavyweight champion between 1919 to 1926. It was a glorious time to be a New Yorker with Dempsey and the Yankees dominating sport.
His popularity attracted the first million-dollar gate. In 1919, Dempsey won the lineal strap with a destructive victory over Jess Willard. It was a three-round demolition that saw Willard knocked down SEVEN times in the opening round.
3) Jack Johnson
More than 100 years after being convicted for violating the Mann Act, President Donald Trump granted a full pardon to Johnson in 2018.
2) Joe Louis
The 'Brown Bomber' - the poster boy for inspiring men and women to sign up and protect America during WW2 - avenged his defeat to the German, blasting him out in less than three minutes inside the Yankee Stadium.
1) Muhammad Ali
Once his ban was lifted in 1970, Joe Frazier would inflict the first defeat of Ali's career a year later in 'The Fight of the Century'. He avenged the loss in 1974 at Madison Square Garden.
His most famous fights were the 'Rumble in the Jungle' and 'Thrilla in Manila' against an up-and-coming Foreman and a trilogy with Frazier, respectively. An estimated audience of more than one billion people tuned in from around the globe to witness Ali getting his hand raised in both contests.
He is the only three-time lineal heavyweight champion and won Ring Magazine's Fighter of the Year six times. His showmanship inside the ring and cultural impact outside of it has seen him ranked as not only the greatest heavyweight of all-time but the greatest fighter.