Professional record: 31-2 (25 KOs)

Kostya Tszyu takes top spot in the rankings due to the way he dominated the light welterweight division.

The Thunder from Down Under competed for the Soviet Union as an amateur but emigrated to Australia in 1992 and turned pro that same year.

He became a world champion for the first time in 1995 when he stopped Jake Rodriguez. 

His reign, and unbeaten record, ended at the hands of Vince Phillips, though Tszyu recovered quickly from the loss.

He survived two early trips to the canvas against Diosbelys Hurtado to become the interim WBC champion in 1998 and from then on produced a string of impressive results that included victories over Julio Cesar Chavez, Zab Judah, Jesse James Leija and Sharmba Mitchell (twice).

However, the end of the line for the heavy-handed Tszyu came with a defeat to Ricky Hatton in Manchester, England, in 2005.

There has been the odd threat of a comeback, but he has resisted the urge to step back inside the ring.

Hatton later told Michael Rosenthal of the Ring magazine: "I hit him with some good shots and he stayed in there. In the end, I had to put out quite an effort to take him down."

Do you agree with the list? Is there an honourable mention who should have squeezed into the top 10? 

Have your say via the comments section. But, remember, it's all a matter of opinion.