2012 Australian Open

Novak Djokovic of Serbia holds the trophy during the awarding ceremony after defeating Rafael Nadal of Spain in the men's singles final at the Australian Open tennis championship, in Melbourne, Australia, early Monday, Jan. 30, 2012.

Serbia's Novak Djokovic poses for a photo of a clock showing the match time of his final against Spain's Rafael Nadal during the men's singles final at the Australian Open tennis championship, in Melbourne, Australia, early Monday, Jan. 30, 2012.

Novak Djokovic of Serbia celebrates winning championship point in his men's final match against Rafael Nadal of Spain during day fourteen of the 2012 Australian Open at Melbourne Park on January 29, 2012, in Melbourne, Australia.

Beads of sweat drop off the face of Spain's Rafael Nadal during a break as he plays Novak Djokovic of Serbia in their men's singles final at the Australian Open tennis championship, in Melbourne, Australia, Sunday, Jan. 29, 2012.

Novak Djokovic of Serbia celebrates after defeating Rafael Nadal of Spain during the men's singles final at the Australian Open tennis championship, in Melbourne, Australia, early Monday, Jan. 30, 2012.

Rafael Nadal celebrates winning the fourth set against Novak Djokovic — AP Photo/Shuji Kajiyama

Rafael Nadal of Spain celebrates, winning the fourth set against Novak Djokovic of Serbia during the men's singles final at the Australian Open tennis championship, in Melbourne, Australia, early Monday, Jan. 30, 2012.

Victoria Azarenka poses with her trophy — AP Photo/Sarah Ivey

Victoria Azarenka of Belarus poses with her trophy on the banks of the Yarra River following her win over Russia's Maria Sharapova in the women's singles final at the Australian Open tennis championship, in Melbourne, Australia, Sunday, Jan. 29, 2012.

Victoria Azarenka of Belarus, center, delivers a speech in front of runner-up Maria Sharapova of Russia, left, and former champion Martina Hingis, right during the awarding ceremony, after Azarenka won their women's singles final at the Australian Open tennis championship, in Melbourne, Australia, Saturday, Jan. 28, 2012.

Victoria Azarenka of Belarus celebrates after defeating Maria Sharapova of Russia during the women's singles final at the Australian Open tennis championship, in Melbourne, Australia, Saturday, Jan. 28, 2012.

Victoria Azarenka hits a backhand return — AP Photo/Rick Rycroft

Victoria Azarenka of Belarus hits a backhand return to Maria Sharapova of Russia during their women's singles final at the Australian Open tennis championship, in Melbourne, Australia, Saturday, Jan. 28, 2012.

Novak Djokovic celebrates after defeating Andy Murray — AP Photo/Andrew Brownbill

Novak Djokovic of Serbia celebrates after defeating Andy Murray of Britain during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, early Saturday, Jan. 28, 2012. Djokovic rallied to beat Murray 6-3, 3-6, 6-7 (4), 6-1, 7-5 in a rematch of the 2011 final at Melbourne Park to reach his third consecutive Grand Slam final.

Andy Murray shouts as he plays Novak Djokovic — AP Photo/Andrew Brownbill

Andy Murray of Britain shouts as he plays Novak Djokovic of Serbia during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, Friday, Jan. 27, 2012.

Novak Djokovic stretches out for a return shot to Andy Murray — AP Photo/John Donegan

Novak Djokovic of Serbia stretches out for a return shot to Andy Murray of Britain during the semifinal at the Australian Open tennis championship, in Melbourne, Australia, Friday, Jan. 27, 2012.

Novak Djokovic plays a shot against Andy Murray — AP Photo/Rick Rycroft

Novak Djokovic of Serbia plays a shot against Andy Murray of Britain during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, Friday, Jan. 27, 2012.

Andy Murray hits a backhand return to Novak Djokovic — AP Photo/Rick Rycroft

Andy Murray of Britain hits a backhand return to Novak Djokovic of Serbia during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, Friday, Jan. 27, 2012.

Victoria Azarenka celebrates after defeating Kim Clijsters — AP Photo/Rick Rycroft

Victoria Azarenka of Belarus celebrates after defeating Kim Clijsters of Belgium during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, Thursday, Jan. 26, 2012.

Maria Sharapova serves to Petra Kvitova — AP Photo/Sarah Ivey

Maria Sharapova of Russia serves to Petra Kvitova of the Czech Republic during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, Thursday, Jan. 26, 2012. Sharapova beat Kvitova with games, 6-2, 3-6, 6-4 to reach the final.

Victoria Azarenka puts a racket on her head after she lost a point — AP Photo/Aaron Favila

Victoria Azarenka of Belarus puts a racket on her head after she lost a point to Kim Clijsters of Belgium during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, Thursday, Jan. 26, 2012.

Rafael Nadal celebrates after defeating Roger Federer — AP Photo/Aaron Favila

Rafael Nadal of Spain celebrates after defeating Roger Federer of Switzerland during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, Thursday, Jan. 26, 2012. Nadal outlasted Federer 6-7 (5), 6-2, 7-6 (5), 6-4 in an Australian Open semifinal Thursday night, the longtime rivals playing with the intensity normally displayed when meeting in a Grand Slam final.

Roger Federer reaches for a return shot — AP Photo/John Donegan

Roger Federer of Switzerland reaches for a return shot to Rafael Nadal of Spain during their semifinal at the Australian Open tennis championship, in Melbourne, Australia, Thursday, Jan. 26, 2012.

Svetlana Kuznetsova and Vera Zvonareva hold the trophy after winning their women's doubles final — AP Photo/Sarah Ivey

Russia's Svetlana Kuznetsova, left, and Vera Zvonareva, right, hold the trophy after winning their women's doubles final against Italy's Sara Errani and Roberta Vinci at the Australian Open tennis championship, in Melbourne, Australia, Friday, Jan. 27, 2012.

Switzerland's Roger Federer makes a backhand return to Argentina's Juan Martin Del Potro during their quarterfinal at the Australian Open tennis championship, in Melbourne, Australia, Tuesday, Jan. 24, 2012.

Caroline Wozniacki of Denmark takes a drink during a break as she plays Kim Clijsters of Belgium in their quarterfinal at the Australian Open tennis championship, in Melbourne, Australia, Tuesday, Jan. 24, 2012.

Beads of sweat drop off the forehead of Spain's Rafael Nadal during a break in his quarterfinal against Tomas Berdych of the Czech Republic at the Australian Open tennis championship, in Melbourne, Australia, Tuesday, Jan. 24, 2012.

Switzerland's Roger Federer serves to Argentina's Juan Martin Del Potro during their quarterfinal at the Australian Open tennis championship, in Melbourne, Australia, Tuesday, Jan. 24, 2012.

Switzerland's Roger Federer makes a backhand return to Argentina's Juan Martin Del Potro during their quarterfinal at the Australian Open tennis championship, in Melbourne, Australia, Tuesday, Jan. 24, 2012.

Roger Federer serves to Juan Martin Del Potro — AP Photo/Sarah Ivey

Roger Federer of Switzerland serves to Juan Martin Del Potro of Argentina during their quarterfinal at the Australian Open tennis championship, in Melbourne, Australia, Tuesday, Jan. 24, 2012.

Serena Williams yells in frustration — AP Photo/John Donegan

Serena Williams of the U.S. yells in frustration during her fourth round match against Russia's Ekaterina Makarova at the Australian Open tennis championship, in Melbourne, Australia, Monday, Jan. 23, 2012.

Williams' 17-match winning streak at the Australian Open ended Monday in a stunning 6-2, 6-3 loss to Ekaterina Makarova, the lowest-ranked woman in the fourth round.

Serena Williams bounces her racket — AP Photo/Shuji Kajiyama

Serena Williams of the U.S. bounces her racket during her fourth round match against Russia's Ekaterina Makarova at the Australian Open tennis championship, in Melbourne, Australia, Monday, Jan. 23, 2012.

Maria Sharapova screams after winning a point — AP Photo/John Donegan

Maria Sharapova of Russia screams after winning a point against Sabine Lisicki of Germany during their fourth round match at the Australian Open tennis championship, in Melbourne, Australia, Monday, Jan. 23, 2012.

Sharapova earned the right to play Russia's Ekaterina Makarova in the quarterfinal when she beat Lisicki 3-6, 6-2, 6-3 in a night match.

Japan's Kei Nishikori raises his arms in celebration after defeating France's Jo-Wilfried Tsonga during their fourth round match at the Australian Open tennis championship, in Melbourne, Australia, Monday, Jan. 23, 2012.

Andy Murray serves to Mikhail Kukushkin — AP Photo/John Donegan

Britain's Andy Murray serves to Kazakhstan's Mikhail Kukushkin during their fourth round match at the Australian Open tennis championship, in Melbourne, Australia, Monday, Jan. 23, 2012. Kukushkin retired with a left hip injury while trailing 6-1, 6-1, 1-0.

Petra Kvitova wipes the sweat from her face — AP Photo/Andrew Brownbill

Petra Kvitova of the Czech Republic wipes the sweat from her face during her fourth round match against Serbia's Ana Ivanovic at the Australian Open tennis championship, in Melbourne, Australia, Monday, Jan. 23, 2012. Kvitova had some trouble late before beating former top-ranked Ivanovic 6-2, 7-6 (2) Monday.

Roger Federer leaps for a smash — AP Photo/John Donegan

Roger Federer of Switzerland leaps for a smash as he plays Australia's Bernard Tomic during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 22, 2012. Federer ended the run of the Australian teenager Tomic 6-4, 6-2, 6-2.

Britain's Andy Murray falls over during his third round match against France's Michael Llordra at the Australian Open tennis championship, in Melbourne, Australia, Saturday, Jan. 21, 2012.

Caroline Wozniacki of Denmark plays a shot against Jelena Jankovic of Serbia during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 22, 2012.

France's Gael Monfils throws his racket at the ball during his third round match against Kazakhstan's Mikhail Kukushkin at the Australian Open tennis championship, in Melbourne, Australia, Saturday, Jan. 21, 2012. Kukushkin beat an ailing Monfils in five sets to become the first man from Kazakhstan to play a round of 16 match at a Grand Slam.

Lleyton Hewitt hits are forehand return — AP Photo/John Donegan

Australia's Lleyton Hewitt hits a forehand return to Canada's Milos Raonic during their third round match at the Australian Open tennis championship, in Melbourne, Australia, Saturday, Jan. 21, 2012.

Lukas Lacko makes a backhand return to Rafael Nadal — AP Photo/Andrew Brownbill

Slovakia's Lukas Lacko makes a backhand return to Spain's Rafael Nadal during their third round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 20, 2012. Nadal was hardly tested in a 6-2, 6-4, 6-2 win to advance to the fourth round.

Denmark's Caroline Wozniacki reaches for a backhand return to Romania's Monica Niculescu during their third round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 20, 2012.

Denmark's Caroline Wozniacki reaches for a forehand return to Romania's Monica Niculescu during their third round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 20, 2012.

Anabel Medina Garrigues injures her right ankle — AP Photo/John Donegan

Anabel Medina Garrigues of Spain falls, injuring her right ankle as she plays Li Na of China during their third round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 20, 2012. The bad sprain forced Garrigues to quit the tournament.

Victoria Azarenka serves to Mona Barthel — AP Photo/Rick Rycroft

Victoria Azarenka of Belarus serves to Germany's Mona Barthel during their third round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 20, 2012.

Victoria Azarenka reaches for a forehand return — AP Photo/Sarah Ivey

Victoria Azarenka of Belarus reaches for a forehand return to Germany's Mona Barthel during their third round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 20, 2012.

Iveta Benesova reacts after defeating Nina Bratchikova — AP Photo/Aaron Favila

Iveta Benesova of the Czech Republic reacts after defeating Russia's Nina Bratchikova in their third round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 20, 2012.

Spain's Rafael Nadal makes a forehand return to Slovakia's Lukas Lacko during their third round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 20, 2012.

John Isner of the U.S. hits a backhand return as a second ball is thrown from the crowd onto the court during his third round match against Spain's Feliciano Lopez at the Australian Open tennis championship, in Melbourne, Australia, Jan. 20, 2012.

Canada's Milos Raonic makes a forehand return to Germany's Philipp Petzschner during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 19, 2012.

Serena Williams yells in frustration during her second round match against Barbora Zahlavova Strycova of the Czech Republic at the Australian Open tennis championship, in Melbourne, Australia, Jan. 19, 2012.

Andy Murray serves to Edouard Roger-Vasselin — AP Photo/John Donegan

Britain's Andy Murray serves to France's Edouard Roger-Vasselin during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 19, 2012.

Serbia's Novak Djokovic serves to Colombia's Santiago Giraldo during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 19, 2012.

Gael Monfils reaches out for a return — AP Photo/Andrew Brownbill

Gael Monfils of France reaches out for a return to Thomaz Bellucci of Brazil during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 19, 2012.

Kim Clijsters returns a ball to Stephanie Foretz Gacon — AP Photo/Andrew Brownbill

Kim Clijsters of Belgium returns a ball to Stephanie Foretz Gacon of France during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 18, 2012. Clijsters needed only 47 minutes to beat Gacon, 6-0, 6-1.

Rafael Nadal makes a forehand return to Tommy Haas — AP Photo/Andrew Brownbill

Spain's Rafael Nadal makes a forehand return to Germany's Tommy Haas during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 18, 2012. Nadal beat Haas 6-4, 6-3, 6-4 in a 2

Italy's Romina Oprandi celebrates after defeating compatriot Francesca Schiavone in their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 18, 2012.

Eleni Daniilidou and Julia Goerges hug each other — AP Photo/Aaron Favila

Eleni Daniilidou of Greece, right, and Julia Goerges of Germany hug each other as Daniilidou retired from their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 18, 2012.

Donald Young smashes his racquet in frustration — AP Photo/Sarah Ivey

Donald Young of the U.S. smashes his racquet in frustration during his second round match against Slovakia's Lukas Lacko at the Australian Open tennis championship, in Melbourne, Australia, Jan. 18, 2012.

Marcos Baghdatis, John Isner, Alexandr Dolgopolov and Denis Istomin are among the players penalized for breaking their rackets at the tournament. Donald Young, Juan Carlos Ferrero and Gilles Simon have also been given $1,500 fines for audible obscenities.

John Isner makes a forehand return to David Nalbandian — AP Photo/Andrew Brownbill

John Isner, bottom, of the U.S. makes a forehand return to Argentina's David Nalbandian during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 18, 2012.

Caroline Wozniacki reaches for a shot — AP Photo/Rick Rycroft

Caroline Wozniacki of Denmark reaches for a shot to Georgia's Anna Tatishvili during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 18, 2012. Wozniacki defeated Tatishvili 6-1, 7-6 (4).

Alexandr Dolgopolov tries to catch a racket — AP Photo/Rick Rycroft

Alexandr Dolgopolov of Ukraine tries to catch a racket as he plays Tobias Kamke of Germany during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 18, 2012.

Gael Monfils serves to Marinko Matosevic — AP Photo/Andrew Brownbill

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

Jo-Wilfried Tsonga celebrates after winning over Denis Istomin — AP Photo/Andrew Brownbill

Jo-Wilfried Tsonga of France celebrates after winning over Denis Istomin of Uzbekistan during their first round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 17, 2012.

Serbia's Novak Djokovic makes a backhand return to Italy's Paolo Lorenzi during their first round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 17, 2012.

Novak Djokovic

Petra Kvitova hits a forehand return — AP Photo/John Donegan

Petra Kvitova of the Czech Republic hits a forehand return to Russia's Vera Dushevina during their first round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 17, 2012.

Germany's Sabine Lisicki makes a backhand return to Switzerland's Stefanie Voegele during their first round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 17, 2012.

Spain's Fernando Verdasco pulls on his tongue in frustration during his first round loss to Australia's Bernard Tomic at the Australian Open tennis championship, in Melbourne, Australia, Jan. 16, 2012.

Spain's Nicolas Almagro celebrates after defeating Lukasz Kubot of Poland during their first round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 16, 2012.

Germany's Tommy Haas reacts as he plays Denis Kudla of the U.S. during their first round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 16, 2012.

Slovakia's Daniela Hantuchova waits for a return during her first round match against Varvara Lepchenko of the U.S. at the Australian Open tennis championship, in Melbourne, Australia, Jan. 16, 2012.

Caroline Wozniacki reaches out for a return — AP Photo/Andrew Brownbill

Caroline Wozniacki of Denmark reaches out for a return to Anastasia Rodionova of Australia during their first round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 16, 2012.

Rafael Nadal prepares to serve — AP Photo/Rick Rycroft

Rafael Nadal of Spain prepares to serve in the late afternoon light during his first round match against and Alex Kuznetsov of the U.S. at the Australian Open tennis championship, in Melbourne, Australia, Jan. 16, 2012.

Caroline Wozniacki of Denmark eyes on the ball for a return to Anastasia Rodionova of Australia during their first round match at the Australian Open tennis championship, in Melbourne, Australia, Jan. 16, 2012.