Hungary's Eva Risztov won gold in the women's 10-kilometer open water swimming marathon Thursday, holding off American Haley Anderson by less than a second.
Risztov led for a majority of the race and held a one-second edge over Italian Martina Grimaldi going into the final lap on Hyde Park's Serpentine lake.
The leaders pushed the pace, and Anderson chased Risztov heading toward the line, gaining ground.
The Hungarian slapped the timing board -- which is above water, as opposed to under at the wall in pool events -- just before the American. Risztov touched in 1 hour, 57 minutes and 38.2 seconds. Anderson was just 0.4 seconds behind.
Grimaldi took bronze with a time of 1:57:41.8, while Great Britain's Keri-anne Payne was fourth. Payne was the silver medalist four years ago in Beijing, the first time the event was part of the Olympic swimming program.