Renner moved differently after the first exchange.
The shoulder tell was gone, or rather, it was being consciously managed, which was not the same as gone but was close enough that relying on it again would be a mistake.
William had seen fighters make that error before, returning to a read that had worked once and finding the second attempt empty because the opponent had closed it.
He wasn't going to make that error.
What he received instead was insight.
A single encounter of genuine contact provided him with more understanding than three hours of reviewing records, details such as how Renner's essence reacts under real pressure, the split second his recovery needs between technique phases, and the precise quality of his footwork when recalibrating rather than executing.
Renner was recalibrating now.
The crowd had quieted into a steady state of genuine attention.
