(BEIJING, August 20) -- Melaine Walker of Jamaica set an Olympic record to win the Women's 400m Hurdles, emerging victorious over pre-race favorite and rival Sheena Tosta of the United States at the National Stadium on Wednesday, August 20.

Walker, in her Olympic debut, crossed the line in 52.64 seconds to prove that it is not only the Jamaican men who can set Athletics records.

Tosta held on for silver in 53.70, with Tasha Danvers of Great Britain claiming the bronze, her first major championships medal, in a personal best 53.84.