Rocky Marciano is a true great and he never lost. Ricardo Lopeez is a true great and he never lost. Mickey Walker is a true great, but he avoided a Tiger Flowers rematch. Julio Cesar Chavez is a true great, but he avoided a Frankie Randall rubber match for a decade. Ray Robinson is probably the greatest ever, but he avoided Charley Burley. Salvador Sanchez was a great fighter, but he avoided Euesebio Pedroza.