During the 2010 Winter Olympics, Dutch speed skater Sven Kramer was heavily favored in the long-distance track, already being a world champion in all the events in which he would compete. He raced to a world record time in the 10,000 meter event. Unfortunately, his coach accidentally told him to change lanes at the wrong time during the course of the race, which got Kramer disqualified.

Full text at: http://www.tomorrowsworld.org/commentary/winning-by-the-rules