#845677Germany's Andrea Petkovic enjoys a winning serve at her fourth round match against Russia's Maria Sharapova. The German player won and advanced to the 2011 Australian Open quarter finals.Sign in or register,to downloadAdd to cartRemove from cartPackage: Tennis. 2011 Australian Open. Day SevenCategories: SportsLocation: Melbourne, AustraliaEvent date: 23.01.2011Date published: 23.01.2011Author: Anton DenisovCredit: SputnikSource: SputnikOriginal: DigitalMedia: JPEG, 2832x4256px, 2.8Mbemotionsjoy