Australian Open Day 7

Updated 1531 GMT (2331 HKT) January 25, 2015
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The relief is clear after Nick Kyrgios wraps up his five-set win over Andreas Seppi in a thriller on the Hirense Arena.
Kyrgios of Australia gets up close and personal with a ball boy during epic win against Seppi. William West/AFP/Getty
Peng Shuia of China shakes hands with Maria Sharapova after being brushed aside by the Russian second seed in their last 16 clash. Greg Wood/AFP/Getty
Simona Halep is captured on the run during her straight sets win over Yanina Wickmayer of Belgium to reach the quarterfinals. MANAN VATSYAYANA/AFP/Getty
Eugenie Bouchard of Canada is a study of concentration on her way to a three-set victory over Romanian Irina-Camelia Begu.
Victory was sweet for world number three Rafael Nadal to earn a quarterfinal berth at the Australian Open. Manan Vatsyayna/AFP/Getty
Andy Murray signals victory after a thrilling four-set battle with Bulgarian Grigor Dimitrov to round out the seventh day of the Australian Open. Greg Wood/AFP/Getty