Jamaican sprinter Usain Bolt has successfully defended his Olympics 100 meter title, winning the race in 9.63 seconds – a new Olympic record.

In one of the most highly anticipated races of the London Games, Bolt matched his gold-medal finish from Beijing 2008, with his fellow Jamaican Yohan Blake earning the silver and American Justin Gatlin taking the bronze.

Earlier Sunday, Ethiopia's Tiki Gelana won the women's marathon Olympic gold medal through the rainy streets of London.

She finished the race at 2:23:07, setting a new Olympic record. Kenya's Priscah Jeptoo came in five seconds later taking the silver, while Russia's Tatyana Petrova Arkhipova received the bronze.

American tennis-playing sisters Serena and Venus Williams teamed up to win the women's doubles gold medal (against Czech pair of Andrea Hlavackova and Lucie Hradecka, who had to settle for the silver medal). Serena won the singles gold medal Saturday.

And Britain's Andy Murray beat Switzerland's Roger Federer to win gold in the men's tennis final.

China's Cai Yun and Fu Haifeng won the men's doubles final in badminton Sunday, completing the first ever clean sweep in all five Olympic badminton events.

China currently leads the overall medal count, followed by the United States and Great Britain.