An aerial view of Melbourne Park, AAMI Park and Olympic Park during day one of the 2012 Australian Open, on January 16, 2012. #

Feliciano Lopez of Spain plays a forehand in his fourth round match against Rafael Nadal of Spain during day seven of the 2012 Australian Open. #

Roger Federer plays a backhand in his quarter-final match against Juan Martin Del Potro of Argentina at Melbourne Park, on January 24, 2012. #

Svetlana Kuznetsova of Russia serves in her third round match against Sabine Lisicki of Germany on day six of the Australian Open, on January 21, 2012. #

Lleyton Hewitt of Australia hits a return to Cedrik-Marcel Stebe of Germany during their men's singles match in Melbourne, on January 17, 2012. #

Novak Djokovic of Serbia hits a return to Santiago Giraldo of Colombia during their men's singles match at the Australian Open, on January 19, 2012. #

An Australian fan shows her support on day nine of the 2012 Australian Open at Melbourne Park, on January 24, 2012. #

Nicolas Almagro of Spain serves to Tomas Berdych of Czech Republic during their men's singles match in Melbourne, on January 22, 2012. #

Roger Federer serves to Juan Martin Del Potro during their quarter-final, in Melbourne, Australia, on January 24, 2012. #

France's Jo-Wilfried Tsonga celebrates after defeating Portugal's Frederico Gil in their third round match at the Australian Open, on January 21, 2012. #

Kim Clijsters of Belgium and Caroline Wozniacki of Denmark shake hands after their quarter final match on January 24, 2012 in Melbourne, Australia. #

Roger Federer pauses during his men's singles quarter-finals match against Juan Martin Del Potro at the Australian Open, on January 24, 2012. #

Novak Djokovic of Serbia drops his racquet after losing a point to Santiago Giraldo of Colombia during their men's singles match in Melbourne, on January 19, 2012. #

Caroline Wozniacki serves in her quarter-final match against Kim Clijsters during day nine of the 2012 Australian Open, on January 24, 2012. #

Maria Sharapova of Russia serves in her quarter-final match against Ekaterina Makarova of Russia on day ten of the Australian Open, on January 25, 2012. #

Gael Monfils of France signs autographs for fans after winning his second round match against Thomaz Bellucci of Brazil on day four of the 2012 Australian Open. #

Vera Zvonareva of Russia hits a return to Ekaterina Makarova of Russia during their women's singles match in Melbourne, on January 21, 2012. #

Nicolas Almagro of Spain reacts during his men's singles match against Tomas Berdych of Czech Republic at the Australian Open, on January 22, 2012. #

Gael Monfils of France serves to Marinko Matosevic of Australia during their first round match at the Australian Open, in Melbourne, on January 17, 2012. #

Caroline Wozniacki of Denmark hits a return to Kim Clijsters of Belgium during their women's singles quarter-finals match in Melbourne, on January 24, 2012. #

Donald Young of the US smashes his racquet in frustration during his second round match against Slovakia's Lukas Lacko at the Australian Open, on January 18, 2012. #

Argentina's Juan Martin Del Potro celebrates after defeating Germany's Philipp Kohlschreiber during their fourth round match in Melbourne, on January 22, 2012. #