Australian Open - Day 4

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Petra Kvitova of Czech Republic struggles in her second round match... News PhotoAustralia,Australian Tennis Open,Czech Republic,Day,Grand Slam,Horizontal,Laura Robson,Match - Sport,Melbourne - Australia,Petra Kvitová,Round Two,Sport,Struggle,Tennis,UKPhotographer Collection: Getty Images Sport 2013 Getty ImagesMELBOURNE, AUSTRALIA - JANUARY 17: Petra Kvitova of Czech Republic struggles in her second round match against Laura Robson of Great Britain during day four of the 2013 Australian Open at Melbourne Park on January 17, 2013 in Melbourne, Australia. (Photo by Julian Finney/Getty Images)