Petrova, who won the race in 2000, clocked a time of 2:25:43, just ahead of Goucher (2:25:53).
Now, there are a couple of new names on the horizon, I understand, Shalane Flanagan and Kara Goucher?
Goucher, making her marathon debut, become the first American on the podium since Anne Marie Letko was third in 1994.
Flanagan has been training with Kara Goucher, a fellow Olympian who finished third here in 2009 and fifth in '11.
When Olympic marathoner Kara Goucher was deciding whether to run the race, she previewed the course from the lead truck in 2007.
"He didn't want my first impression to be negative, " said Flanagan, who finished 10th at the London Olympics, 16 seconds ahead of Goucher.
Goucher said she owes making the Olympic team to Flanagan and would love to repay the favor by pushing a fellow American to victory.
Goucher finished 56 seconds clear in one hour, six minutes and 57 seconds to set the year's fastest half-marathon and the eighth quickest in history.
"Having a friend to go through it with makes it a team element, especially in a sport where you can get so isolated, " Goucher said.
Radcliffe, competing in her first race for 21 months, began at a good pace and kept up with Goucher for the first six miles but the American then broke free.
The 33-year-old marathon world record holder started confidently enough but eventually had no answer to Goucher, who produced an astounding performance for a woman who had never previously run such a distance competitively.
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