Serena Williams teamed with big sister Venus Williams to win the women's doubles title at the Olympics on Sunday, adding to the singles gold she won on Centre Court at Wimbledon a day earlier. The American sisters beat Andrea Hlavackova and Lucie Hradecka of the Czech Republic 6-4, 6-4 under the roof on a rainy afternoon at the All England Club. Venus -- with her red, white and blue braids pulled back into a bun -- closed out the match with a backhand volley winner after the Czechs saved a pair of match points.
