Legendary boxing journalist Bert Randolph Sugar guides you through the careers and personalities of the top 10 heavyweight boxers of all time, including Muhammad Ali, Rocky Marciano, Joe Louis and "Smokin'" Joe Frazier. Featuring hours of classic fight footage from unforgettable bouts such as the Ali vs. Frazier showdown "Thrilla in Manila," this retrospective highlights the most memorable -- and often controversial -- moments in the sport.