Prokopenko, who won bronze in World Cup #1, won 23 victories. She moved her way up the leader board through the morning, finally overauling early leader Katy Burke (GBR), who finished third equal.
But the Briton, who missed the early season with injury wasn't too disappointed. "I am really pleased," Burke said. "I felt like it has been improving in training and not coming through in competition until today. I just have to take it one event at a time and see what happens."
Many of the athletes fancied for victory today are in good shape after the first event. Marques lies seventh with 20 victories. One victory more put double Olympic Champion Victoria Tereshuk (UKR) into a share of third with Burke.