Richards-Ross wins 400m for U.S.

Sanya Richards-Ross of the United States won gold in the women's 400 meters Sunday at the London Games, edging defending champion Christine Ohuruogu of Great Britain.

Richards-Ross picked up her first individual Olympic gold medal with a time of 49.55 seconds. She won bronze in the 400 four years ago in Beijing.

Ohuruogu finished the lap in 49.70 seconds and DeeDee Trotter of the U.S. was just .02 seconds behind her for bronze.

It's the fourth total medal for Richards-Ross, who is married to Jacksonville Jaguars defensive back Aaron Ross. She also has two golds in the 1,600-meter relay.

Ohuruogu was trying to become only the second woman to win consecutive 400m golds. Marie-Jose Perec of France won two straight golds at the 1992 and 1996 Summer Games.

Francena McCorory of the U.S. finished in seventh place.