Doubt it. Mas Oyama, although I don't like him, was a powerful man. I'd say if he was in a match, it would definitely involve 2 people pretty much beat up. And him giving up of frustration. Doubt it. And then him being fatigued to the point where he couldn't continue. Hello? We're talking about the creator of the "hundred-man kumite". How can he get tired by one tai-chi master??
And Mas Oyama admitting defeat?? HAHA. Doubt it. He was as stubborn as a rock. He wouldn't stop until he won, or until he was knocked out.