There has been so many great fighters in so many different eras. Lots of whom have staked a claim to be the greatest fighter the world has ever seen. It's a sensitive subject and it's a subject that has divided opinion for decades.
Nevertheless, the same old question is often asked; who would've won if Muhammad Ali and Mike Tyson could've met in their respective heydays.
For the first time, I will express how I think it may have unfolded.
Ali was an elegant fighter, with blinding hand speed, graceful movement and an undying will to win. He was courageous and proud and he never shirked a challenge.
In 1964, when he was still known as Cassius Marcellus Clay, Ali slayed the proverbial dragon. He was David to Sonny Liston's Goliath.
At the time, Liston was considered unbeatable and the American public loathed him for pummelling their champion, Floyd Patterson. He was a former convict and he wasn't the man that the people saw as the stereotypical role model.
However, when a cocky young man named Clay burst on to the scene, the world slowly warmed to Liston. They wanted him to shut the mouth of the Louisville Lip.
A new era was beginning, though, and the braggadocios 22-year-old utterly outclassed the "Big Ugly Bear", en route to a six round win.
Ten years later, Ali repeated the feat of dethroning an immortal champion, when he knocked out George Foreman in Kinshasa, Zaire.
Foreman was the most fearsome fighter since the aforementioned Liston. With 37 knockouts from 40 wins, he was the resounding favourite to beat, batter and bludgeon the fading legend.
Ali hadn't read the script and he came up trumps once again. This time with an eighth round knockout.
"Iron" Mike was a savage beast inside the ring.
The small and chubby Brooklyn boy with ruthless aggression and natural power was nurtured and loved by Cus D'Amato and Kevin Rooney, until he became an ultimate fighting machine that was capable of maiming a man with a single punch.
With his lightning hand speed, exquisite timing, flawless movement and an impenetrable defence, Tyson began a reign of terror over the heavyweight division.
In 1986, "The Baddest Man On The Planet" annihilated Trevor Berbick in less than two rounds to relieve the Canadian of the WBC title. He was just 20 years, 4 months and 22 days old at the time and he remains the youngest world heavyweight champion in the history of the sport.
After beating James "Bone-Crusher" Smith and Tony "TNT" Tucker to claim the WBA and IBF belts, Tyson became the undisputed King of boxing.
During that period, most of his opponents were beaten before a punch was thrown. The majority of his victims were terrified of him.
If a blockbuster battle between Ali and Tyson had happened, I think the latter would've won by stoppage in the eleventh or twelfth round.
Ali would've almost certainly been ahead on the scorecards at the time of the stoppage. He would've employed a stick and move game plan and he would've had success in the early and middle rounds.
Unfortunately for him, though, Tyson was an indestructible tank in his prime and he would've caught up with Ali in the championship rounds.
A rapid combination of hooks to the body and head of "The Greatest", followed by a venomous uppercut would've scored the first knockdown of the fight when Ali was spent of energy. With Tyson poised to attack once again, Angelo Dundee would've thrown in the towel to save his man from the animal at the other side of the ring.