With nine Grand Slam singles titles, a pair of Olympic gold medals and a steely championship resolve, Serena Williams has been named SI.com's Female Athlete of the Decade.
How do the WTA's biggest stars spend the offseason? SI.com's Jon Wertheim explores.
From the best players -- Roger Federer and Serena Williams -- to the one-hit wonders to the most memorable villains, SI.com's Jon Wertheim looks back at the decade that was.