if we talk about fighting as it is...
I don't know is there enough time in human age span to learn the art of boxing (arm combat) to the level of tysons or mayweathers while having wrestling at the level of fedor or koga at the same time....
but when talk about fighing, when it happends in a war zone, battleground, in a store, in the streets... 90% of the time it goes to the ground before either fighter is knocked down. Fighting consists using the whole human body, that's what
not nasser size bruce lee has said his entire life.