Australian Open - Day 7

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Novak Djokovic of Serbia celebrates after winning a game in his... News PhotoAustralia,Australian Tennis Open,Celebration,Day,Grand Slam,Headshot,Horizontal,Match - Sport,Melbourne - Australia,Novak Djokovic,One Person,People,Round Four,Serbia,Sport,Stanislas Wawrinka,Switzerland,Tennis,WinningPhotographer Collection: Getty Images Sport 2013 Getty ImagesMELBOURNE, AUSTRALIA - JANUARY 20: Novak Djokovic of Serbia celebrates after winning a game in his fourth round match against Stanislas Wawrinka of Switzerland during day seven of the 2013 Australian Open at Melbourne Park on January 20, 2013 in Melbourne, Australia (Photo by Scott Barbour/Getty Images)