Many of the top boxers have had extensive amateur careers where there is very little money involved. Obviously they get into it initially from a love of the sport and a desire to challenge themselves. So, in that respect it isn't really about money at that stage. Or maybe that's a naive way of looking at it?

At the professional level money is obviously the thing that motivates a hungry fighter, but again I think when you reach a certain level, money ceases to be the main motivating force. Ali didn't keep fighting for as long as he did solely because of the fiscal benfits. I think he was addicted to the limelight and the glory, as much, or if not more, than the money.

But in most cases I would say it is about the money rather than the glory. But you get certain fighters like Duran and Chavez who you really feel just loved to fight above all other considerations.

It's an interesting one.