What They Don't Teach You At Harvard Business SchoolBy: Mark H. McCormack Mark McCormack, dubbed 'the most powerful man in sport', founded IMG (International Management Group) on a handshake. It was the first and is the most successful sports management company in the world, becoming a multi million dollar, worldwide corporation whose activities in the business and marketing spheres are so diverse as to defy classification. Here, Mark McCormack reveals the secret of his success to key business issues