By

Amethyst Tate /

CBS News/ July 6, 2012, 4:10 PM

Serena Williams

Tennis players Serena Williams, left, and Venus Williams playing in their first-round women's doubles match on day four of the 2012 Wimbledon Championships in Wimbledon, southwest London, on June 28, 2012.

/ Andrew Yates/Getty Images

Age: 30

Hometown: Saginaw, Mich. and Lynwood, Calif.

Sport: Tennis

Sisters Serena and Venus Williams will be seeking their third gold medal in London during their doubles competition, which they won in 2000 and 2008. 

Serena Williams will be playing in both the singles and doubles competitions. She goes to London with 27 Grand Slam titles and more prize money than any other female athlete.