Definitely not Ali….he was fighting at one of many weights and lost a number of fights. Not even the best Boxer….good as he was was!
Phil ‘The Power’ Taylor does take a lot of beating, with 16 world championships and he only took the game up when he was 26….amazing!
However, its not really a sport, so you have to go for mass participation sports where money is not required to buy good equipment, so no cars, bikes etc.
That leave football and running. Lots of different distances for running so impossible to choose one…although Bolt must be right up there.
Which leaves footie……..Pele, Maradona or Messi?
I think I’d have to to for Maradona, despite being a cheating, drug taking little b@stard, he really was from another planet! Messi is getting close though!