The WBA and WBC, recognizing that Valdez probably wasn't in the best of moods to fight during his first confrontation with Monzon, ordered a second fight between the rivals, and so they fought again, on July 30, 1977, once again at Monte Carlo. This time around, Valdez knocked down Monzon in the second round, becoming the only man to send the Argentine to the floor in Monzon's long career. Valdez was leading after seven rounds, but Monzon mounted a late rally that allowed him to keep the title by a close decision.