Victoria Azarenka of Belarus holds an ice towel to her face during a break in her fourth round match against Barbora Strycova of the Czech Republic at the Australian Open tennis championships in Melbourne, Australia, Monday, Jan. 25, 2016.(AP Photo/Vincent Thian)
Danielle Knudson (R), girlfriend of Canada's Milos Raonic, reacts after he won his fourth round match against Switzerland's Stan Wawrinka at the Australian Open tennis tournament at Melbourne Park, Australia, January 25, 2016. REUTERS/Thomas Peter
Madison Keys of the U.S. reacts as she sits in her chair during her fourth round match against China's Zhang Shuai at the Australian Open tennis tournament at Melbourne Park, Australia, January 25, 2016. REUTERS/Thomas Peter TPX IMAGES OF THE DAY
Britain's Andy Murray reacts during his fourth round match against Australia's Bernard Tomic at the Australian Open tennis tournament at Melbourne Park, Australia, January 25, 2016. REUTERS/Thomas Peter TPX IMAGES OF THE DAY
Spain's David Ferrer celebrates after winning his fourth round match against John Isner of the U.S. at the Australian Open tennis tournament at Melbourne Park, Australia, January 25, 2016. REUTERS/Brandon Malone
Ekaterina Makarova of Russia reacts after losing a point to Johanna Konta of Britain during their fourth round match at the Australian Open tennis championships in Melbourne, Australia, Monday, Jan. 25, 2016.(AP Photo/Andrew Brownbill)
Danielle Knudson (R), girlfriend of Canada's Milos Raonic, reacts after he won his fourth round match against Switzerland's Stan Wawrinka at the Australian Open tennis tournament at Melbourne Park, Australia, January 25, 2016. REUTERS/Thomas Peter
Madison Keys of the U.S. reacts as she sits in her chair during her fourth round match against China's Zhang Shuai at the Australian Open tennis tournament at Melbourne Park, Australia, January 25, 2016. REUTERS/Thomas Peter TPX IMAGES OF THE DAY
Britain's Andy Murray reacts during his fourth round match against Australia's Bernard Tomic at the Australian Open tennis tournament at Melbourne Park, Australia, January 25, 2016. REUTERS/Thomas Peter TPX IMAGES OF THE DAY
Spain's David Ferrer celebrates after winning his fourth round match against John Isner of the U.S. at the Australian Open tennis tournament at Melbourne Park, Australia, January 25, 2016. REUTERS/Brandon Malone
Ekaterina Makarova of Russia reacts after losing a point to Johanna Konta of Britain during their fourth round match at the Australian Open tennis championships in Melbourne, Australia, Monday, Jan. 25, 2016.(AP Photo/Andrew Brownbill)
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