Kronk Gym is a boxing gym located in Detroit and operated by the famous trainer Emanuel Steward. Steward achieved his most notable early success with welterweight Thomas Hearns, whom he changed from a light hitting boxer into a devastating puncher. Hearns became one of Steward's most successful and popular fighters, fighting Sugar Ray Leonard, knocking out Roberto Durán, and challenging undisputed Middleweight Champion Marvelous Marvin Hagler in a fight known as The War. He is currently training heavyweight Wladimir Klitschko, among others