2013-02-02 10:47 PM
Tretiakov led by nearly half a second ahead of Dukurs going into the fourth and final run, and he narrowly held off his Latvian rival to win by just 0.03 seconds.
Dukurs, responding to a poor third run, had clocked the fastest time of the competition in his final trip to down an Olympia track dusted with snow.
Racing last, Tretiakov then got off to his usual fast start but still saw his lead become smaller and smaller at every split time.
Bronze medalist Sergei Chudinov of Russia was 2.27 behind Tretiakov's combined time of 4 minutes, 32.35 seconds.
John Daly of the United States placed in a tie for fifth, 2.84 behind Tretiakov, while 2010 Olympic champion Jon Montgomery of Canada was seventh.
Tretiakov, the Olympic bronze medalist, sent a strong message one year ahead of his home Winter Games in Sochi.
Dukurs took silver at the Olympics and had won each overall World Cup, world and European title since Vancouver until Saturday's defeat.
Earlier, Alexsandr Zubkov of Russia took a narrow lead at the midway point of the four-man bobsled competition, and defending champion Steven Holcomb of the U.S. was third.
Zubkov and his crew of Alexey Negodaylo, Dmitry Trunenkov and Maxim Mokrousov had a combined two-run time of 2 minutes, 10.84 seconds, to lead German driver Maximilian Arndt by 0.05.
Holcomb, the Olympic champion, and his crew of Justin Olsen, Steven Langton and Curtis Tomaseviczis placed 0.30 behind Zubkov ahead of the final two runs Sunday.