The brothers are gearing up for battle once again - this time at November's Kyokushin Karate World Open in Tokyo. Hong Kong-based Alain N'Galani and James Kouame, siblings despite sporting different family names, are shaping up for the big fight.
But only one will walk on to the canvas, for they have vowed never to fight each other - a pledge made to their parents many years ago.
So Alain will suit up, or rather strip down to his trunks, reveal his washboard abs and go for glory. James, meanwhile, will serve as coach, trainer and sparring partner.
And a third brother, Sylvain Kouame, will also act as a punching bag.
Alain, 31, James, 33, and Sylvain, 27, were all born in Cameroon and are three of eight children, seven of whom are boys, and all of whom practise martial arts. Now living and working in Hong Kong, they share 15 African championships (kickboxing and full contact karate) and four world championships (muay thai, oriental boxing, full contact karate and kickboxing) between them.
Cheerfully perplexed by the fascination with their different family names, Alain explains: 'We have the same mother and the same father. In our tribe, all children do not have to have the same name. Some have names from our father's family and some have names from our mother's family.'