Recently I watched the film Bloodsport which stars JCVD. I was interested in a similar film I watched ages back which has the same theme but cannot remember its name. I do remember that the star/hero of the film was a fighter from America who took the place of somebody else in the martial arts tournament in which they fight to the death. I also clearly remember one fight in which a sumo wrestler fights the 'baddie' of the film and the sumo wrestler ends up being killed by just two punches one in the stomach and one in the neck. Any help would be appreciated in naming the film.