The canvas should be covered in blood during the Yamada and Ken fight, yet the canvas is always clean.
The way Ken Wong holds the belt at the end.
After Ken wins the final bout, he is lifted up and raises the championship belt over his head. He alternates between holding the bottom of the belt and holding the top of the belt.
When Yamada uppercuts Ken, he spurts blood out of his mouth, but the blood is obviously coming out of a high-powered hose from behind his back.