Serena Williams Launches Mobile App Workout

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Serena Williams of the USA poses with her purple and orange Nike... News PhotoAustralia,Australian Tennis Open,Competition,Grand Slam,Horizontal,Looking At Camera,Melbourne - Australia,One Person,People,Portrait,Purple,Serena Williams,Sport,Tennis,USA,Waist UpPhotographer Collection: Getty Images Sport 2013 Getty ImagesMELBOURNE, AUSTRALIA - JANUARY 08: Serena Williams of the USA poses with her purple and orange Nike Pleated Knit Dress which she will debut at the 2013 Australian Open tournament on January 8, 2013 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)