Floyd Mayweather has stepped up his war of words with Ricky Hatton by claiming to be the greatest boxer ever.
Mayweather is regarded as a modern-day boxing great
The unbeaten American welterweight insists he is even better than legends Sugar Ray Robinson and Muhammad Ali.
The 30-year-old, who fights Hatton in Las Vegas on 8 December, said: "I can quit today and be known as the best fighter that ever lived.
"I respect what Robinson and Ali did for the sport. But I am the greatest, and this is my time."
Hatton, who has held world titles at both welterweight and light-welterweight, is also undefeated and lists Jose Luis Castillo and Kostya Tszyu as his most notable victims.
But Mayweather, who has beaten the likes of Castillo, Oscar de la Hoya, DeMarcus Corley, Zab Judah and Sharmba Mitchell, has dismissed the Briton as "dirty" and one-dimensional.
"I didn't get the chance to watch him against Kostya Tszyu," said Mayweather.
"I already knew what it was - punch, hold, punch, hold. From what I've seen, it was extremely dirty.
"And that's what I'm saying - that Ricky Hatton is a very dirty fighter."