hard to pick one. people forget about his performances as a contender but the one that comes to mind is the job he did on Duran. He really put the kibosh on him and I think he destroyed his confidence for all time. You would think Duran would have been more motivated in the rubber match That guy in the video, sparring with Leonard, why did he do such a DUMB THING??? you would think the general public would exercise caution when in the ring with professionals. The same happened when another Sugar insulted the great Robinson and paid for it.