Was it a renowned martial artist?Was it Sho Kosugi? Chili-P (It's my signature, yo.)
Yes, I would like to know this a well!
Yes, it was Sho Kosugi who stunt-doubled Lee Van Cleef, wearing a half-bald skullcap if the Master was fighting in plainclothes, or the black ninja robes if that was what he was wearing for the fight!