Sonny Liston 's managers fixed a return bout clause on his fight with Clay .
Liston , already under criticism for his ties to the underworld and for quitting the fight , came in for increased suspicion when it was revealed his managers had negotiated a return bout clause with Clay , meaning that Liston 's camp had the right to an immediate rematch , and could dictate its terms , if Clay won .
Muhammad Ali vs. Sonny Liston