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

She finished the race (at 2:23:07), seconds ahead of Kenya's Priscah Jeptoo, who won silver. Russia's Tatyana Petrova Arkhipova took the bronze.

Later Sunday, the world's fastest men will line up for the 100-meter race where fans will be looking to see if Jamaica's Usain Bolt will be able to keep his Olympic crown.

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.

Also Saturday, American swimmer Michael Phelps ended his career with another gold medal, ending his dominance over three Olympics with 18 gold medals and 22 medals overall — both records for any Olympic athlete.

The millionaire NBA players from the U.S. barely won their qualifying match against tough Lithuania Saturday with a score of 99-94.