Australian Open - Day 7

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