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Switzerland's Roger Federer hits a return against Britain's Andy Murray during their men's singles semi-final match on day 12 of the Australian Open tennis tournament in Melbourne on January 25, 2013. MANAN VATSYAYANA/AFP/Getty Images

Britain's Andy Murray reaches for a return to Switzerland's Roger Federer during their semifinal match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 25, 2013. (AP Photo/Greg Baker)

Spectators show their support for Switzerland's Roger Federer during his men's singles semi-final against Britain's Andy Murray on day twelve of the Australian Open tennis tournament in Melbourne on January 25, 2013. PAUL CROCK/AFP/Getty Images

Switzerland's Roger Federer hits a return against Britain's Andy Murray during their men's singles semi-final match on day 12 of the Australian Open tennis tournament in Melbourne on January 25, 2013. MANAN VATSYAYANA/AFP/Getty Images

Britain's Andy Murray serves against Switzerland's Roger Federer during their men's singles semi-final match on day 12 of the Australian Open tennis tournament in Melbourne on January 25, 2013. MANAN VATSYAYANA/AFP/Getty Images

Supporters attend a men's singles semi-final match between Britain's Andy Murray and Switzerland's Roger Federer on day 12 of the Australian Open tennis tournament in Melbourne on January 25, 2013. PETER PARKS/AFP/Getty Images

Andy Murray of Britain takes a drink during a break in play in his men's singles semi-final match against Roger Federer of Switzerland at the Australian Open tennis tournament in Melbourne January 25, 2013. REUTERS/Tim Wimborne

Supporters attend a men's singles semi-final match between Britain's Andy Murray and Switzerland's Roger Federer on day 12 of the Australian Open tennis tournament in Melbourne on January 25, 2013. PETER PARKS/AFP/Getty Images

Switzerland's Roger Federer serves to Britain's Andy Murray during their semifinal match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 25, 2013. (AP Photo/Andy Wong)

Andy Murray of Britain hits a return to Roger Federer of Switzerland during their men's singles semi-final match at the Australian Open tennis tournament in Melbourne January 25, 2013. REUTERS/Toby Melville

Roger Federer of Switzerland serves to Andy Murray of Britain during their men's singles semi-final match at the Australian Open tennis tournament in Melbourne January 25, 2013. REUTERS/Tim Wimborne

Andy Murray of Britain (L) shakes hands with Roger Federer of Switzerland after defeating him in their men's singles semi-final match at the Australian Open tennis tournament in Melbourne, January 25, 2013. REUTERS/Toby Melville

Switzerland's Roger Federer (L) and Britain's Andy Murray (R) pose for a photograph before their men's singles semi-final match on day 12 of the Australian Open tennis tournament in Melbourne on January 25, 2013. PETER PARKS/AFP/Getty Images

Britain's Andy Murray signs autographs after winning his semifinal match against Switzerland's Roger Federer at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 25, 2013. (AP Photo/Aaron Favila)

Britain's Andy Murray reacts after winning his men's semifinal against Switzerland's Roger Federer at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 25, 2013. (AP Photo/Dita Alangkara)

Andy Murray of Great Britain falls to the ground in his semifinal match against Roger Federer of Switzerland during day twelve of the 2013 Australian Open at Melbourne Park on January 25, 2013 in Melbourne, Australia. (Photo by Julian Finney/Getty Images)

Roberta Vinci and Sara Errani of Italy pose with the championship trophy after winning their doubles final match against Ashleigh Barty and Casey Dellacqua of Australia during day twelve of the 2013 Australian Open at Melbourne Park on January 25, 2013 in Melbourne, Australia. (Photo by Cameron Spencer/Getty Images)

Italy's Sara Errani, left, and Roberta Vinci kiss their trophy for photographers after winning the women's doubles final against Australia's Ashleigh Barty and Casey Dellacqua at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 25, 2013. (AP Photo/Andy Wong)

Italy's Sara Errani, right, and Roberta Vinci kiss their trophy for photographers after winning the women's doubles final against Australia's Ashleigh Barty and Casey Dellacqua at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 25, 2013. (AP Photo/Dita Alangkara)

Sara Errani of Italy plaus a forehand in her doubles final match with Roberta Vinci of Italy against Ashleigh Barty and Casey Dellacqua of Australia during day twelve of the 2013 Australian Open at Melbourne Park on January 25, 2013 in Melbourne, Australia. (Photo by Mark Kolbe/Getty Images)

Casey Dellacqua of Australia plays a backhand in her doubles final match with Ashleigh Barty of Australia against Sara Errani and Roberta Vinci of Italy during day twelve of the 2013 Australian Open at Melbourne Park on January 25, 2013 in Melbourne, Australia. (Photo by Mark Kolbe/Getty Images)

Carol Zhao of Canada and Ana Konjuh of Croatia pose with the championship trophy after winning their Junior Girls' Doubles final match against Oleksandra Korashvili of the Ukraine and Barbora Krejcikova of the Czech Republic during day twelve of the 2013 Australian Open at Melbourne Park on January 25, 2013 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

Ashley Barty of Australia (R) looks on as compatriot Casey Dellacqua plays a return during their women's doubles final against Sara Errani and Roberta Vinci of Italy on day twelve of the Australian Open tennis tournament in Melbourne on January 25, 2013. WILLIAM WEST/AFP/Getty Images

Ashley Barty of Australia (R) looks on as compatriot Casey Dellacqua plays a return during their women's doubles final against Sara Errani and Roberta Vinci of Italy on day twelve of the Australian Open tennis tournament in Melbourne on January 25, 2013. WILLIAM WEST/AFP/Getty Images

Shingo Kunieda of Japan and Michael Jeremiasz of France with the winners trophy, and Adam Kellerman of Australia and Stefan Olsson of Sweden with the runners up trophy after their Wheelchair Doubles Final against at Melbourne Park on January 25, 2013 in Melbourne, Australia. (Photo by Michael Dodge/Getty Images)

David Wagner of the United States of America plays a backhand in his Quad Wheelchair Doubles Final match with Nicholas Taylor of the United States of America against Anders Hard of Sweden and Andrew Lapthorne of Great Britain during the 2013 Australian Open Wheelchair Championships at Melbourne Park on January 25, 2013 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

Nicholas Taylor of the United States of America plays a forehand in his Quad Wheelchair Doubles Final match with David Wagner of the United States of America against Anders Hard of Sweden and Andrew Lapthorne of Great Britain during the 2013 Australian Open Wheelchair Championships at Melbourne Park on January 25, 2013 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

Jiske Griffioen of the Netherlands and Aniek Van Koot of the Netherlands pose with the trophy after winning their Women's Wheelchair Doubles Final match against Lucy Shuker of Great Britain and Marjolein Buis of the Netherlands during day twelve of the 2013 Australian Open at Melbourne Park on January 25, 2013 in Melbourne, Australia. (Photo by Robert Prezioso/Getty Images)

Sara Errani (R) and Roberta Vinci (L) of Italy pose with the trophy and ballboys as they celebrate after victory in their women's doubles final against Ashley Barty and Casey Dellacqua of Australia on day twelve of the Australian Open tennis tournament in Melbourne on January 25, 2013. WILLIAM WEST/AFP/Getty Images