Has the dust settled on Floyd Mayweather's five? Well, the Sky Sports pundits are still picking theirs, with Glenn McCrory next.
The former world champion has fighters from the past but it is hard to argue against. And he also has an inkling Money might do the honourable thing, too...
1) Sugar Ray Robinson - 173-19-6-KO108 (1940-1965)
Glenn says: Robinson is untouchable. He fought in an era when life was ridiculously tough and everyone he took on was hard as nails - and he would fight them a month later! He was a mix of a vicious animal and a graceful dancer. I've never seen anyone else throw a 30-punch combination! He had everything, in abundance. He was in a different league to everyone.
2) Harry Greb - 261-48-19-KO48 (1913-1926)
Glenn says: He is the opposite to Robinson, but he was my type of fighter. Mayweather is 48-0 in 18 years but Greb would've done that in one year. He was blind in one eye and half-blind in the other and would just see shadows in front of him and blitz them. He just fought with heart and desire and out of the ring was a superstar of his time.
3) Roberto Duran - 103-16-KO70 (1968-2001)
Glenn says: He was just everything about a South American fighter you wanted: the hard life, the aggression, the desire and even that 'tache! He had all the skills and all the styles and you can forget when he was up at super-middleweight or light-heavy, because when he was a lightweight no-one touched him. The epitome of boxing: no glamour just brutality.
4) Muhammad Ali - 56-5-0-KO37 (1960-1981)
Glenn says: He is The Greatest because to me, he was more than a fighter- he was everything about boxing that you wanted to see. He wasn't the greatest fighter because he just threw hooks and straight punches but he would out-psyche, out-think and out-talk anyone. And I mean anyone. He'd have had Mike Tyson mumbling in his sleep!He will always be The Greatest.
5) Joe Louis - 66-3-KO52 (1934-1951)
Glenn says: This was a guy who held the world heavyweight title for 11 years, when being black in America was so tough. You had to say and do the right things but he did it with dignity. Louis showed himself to be a great, great fighter who couldn't be touched. At that time they were looking for the great white hope but with Joe there, everyone had no hope. And he had the greatest jab ever.
On Mayweather...
Glenn says: Yes he is a great fighter, a great technician and tactician but I would love to see him in a 50-50 fight, not the usual 60-40. It's not that I don't like or admire him, but he has too much power for me and everything has been put on his plate. I come from a time, and like most of everyone's top fighters, didn't get choices and didn't get breaks.
But even with that, Mayweather will go down as a great and should go down as a great. If he doesn't go for 50-0 and calls it a day, then will get so, so much respect from me. He knows he can break Rocky Marciano's record, no trouble at all but I just have a feeling he respects that record. If he quits at 49-0 it will be fantastic.