Sonny Bill Williams sorry for saying boxing judges corrupt Quade Cooper and Sonny Bill Williams in training today. A REMORSEFUL Sonny Bill Williams says he will never label judges corrupt again and that he's learnt his lesson. Just hours after good friend and training partner Anthony Mundine's decision loss to Daniel Geale last Wednesday night, Williams took to Twitter to voice outrage at the judges' call. Hanging out with @anthony_mundine celebrating a victory.. Williams tweeted. Williams trained in Brisbane today ahead of his bout against South African veteran Francois Botha on Friday night and says he got caught in the moment. "I learnt my lesson," Williams says. At the time, I was all full of emotions. At times like that you do and say silly things. I didn't mean no disrespect to the Geale camp because he's a great champion. It was just how I saw the fight. Sometimes if you have nothing nice to say you should just stay quiet. A bulked up Williams was impressive during a sparring session, clearly improving his technique from his last fight in which he knocked out Clarence Tillman. Williams and Botha fight for the WBA International heavyweight title at the Brisbane Entertainment Centre. The co-main event will see rugby star Quade Cooper make his professional boxing debut against Barry Dunnett.