Victoria Azarenka of Belarus signs autographs for fans after defeating Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece hits a return to Victoria Azarenka of Belarus during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Victoria Azarenka of Belarus hits a return to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Victoria Azarenka of Belarus blows kisses to the crowd after defeating Eleni Daniilidou of Greece in their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Victoria Azarenka of Belarus waves to the crowd after defeating Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Victoria Azarenka of Belarus celebrates defeating Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Victoria Azarenka of Belarus hits a return to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS TPX IMAGES OF THE DAY)

An offical holds an umbrella to shade Victoria Azarenka of Belarus during a break in play in her women's singles match against Eleni Daniilidou of Greece at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece hits a return to Victoria Azarenka of Belarus during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Victoria Azarenka of Belarus hits a return to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Victoria Azarenka of Belarus serves to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece celebrates winning one game in the first set during her women's singles match against Victoria Azarenka of Belarus at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Victoria Azarenka of Belarus hits a return to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

The roof on Rod Laver Arena opens up before the women's singles match between Victoria Azarenka of Belarus and Eleni Daniilidou of Greece at the Australian Open tennis tournament in Melbourne January 17, 2013. REUTERS/David Gray (AUSTRALIA - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece returns the ball to Caroline Wozniacki of Denmark during the French Open tennis tournament at the Roland Garros stadium in Paris May 29, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece prepares to hit a return during her match against Caroline Wozniacki of Denmark during the French Open tennis tournament at the Roland Garros stadium in Paris May 29, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: SPORT TENNIS)

Caroline Wozniacki of Denmark returns the ball to Eleni Daniilidou of Greece during the French Open tennis tournament at the Roland Garros stadium in Paris May 29, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece returns the ball to Caroline Wozniacki of Denmark during the French Open tennis tournament at the Roland Garros stadium in Paris May 29, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: SPORT TENNIS)

Caroline Wozniacki of Denmark returns the ball to Eleni Daniilidou of Greece during the French Open tennis tournament at the Roland Garros stadium in Paris May 29, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: SPORT TENNIS TPX IMAGES OF THE DAY)

Caroline Wozniacki of Denmark serves to Eleni Daniilidou of Greece during the French Open tennis tournament at the Roland Garros stadium in Paris May 29, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: SPORT TENNIS)

Julia Goerges of Germany serves to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 18, 2012. REUTERS/Vivek Prakash (AUSTRALIA - Tags: SPORT TENNIS)

Julia Goerges of Germany serves to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 18, 2012. REUTERS/Vivek Prakash (AUSTRALIA - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece (R) is hugged by Julia Goerges of Germany after Daniilidou retired from their women's singles match at the Australian Open tennis tournament in Melbourne January 18, 2012. REUTERS/Vivek Prakash (AUSTRALIA - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece hits a return to Kimiko Date-Krumm of Japan during their women's singles match at the Australian Open tennis tournament in Melbourne January 16, 2012. REUTERS/Mark Blinch (AUSTRALIA - Tags: SPORT TENNIS)

Kimiko Date-Krumm of Japan prepares to serve to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 16, 2012. REUTERS/Mark Blinch (AUSTRALIA - Tags: SPORT TENNIS)

Kimiko Date-Krumm of Japan hits a return to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 16, 2012. REUTERS/Mark Blinch (AUSTRALIA - Tags: SPORT TENNIS)

Kimiko Date-Krumm of Japan reacts during her women's singles match against Eleni Daniilidou of Greece at the Australian Open tennis tournament in Melbourne January 16, 2012. REUTERS/Mark Blinch (AUSTRALIA - Tags: SPORT TENNIS)

Kimiko Date-Krumm of Japan hits a return to Eleni Daniilidou of Greece during their women's singles match at the Australian Open tennis tournament in Melbourne January 16, 2012. REUTERS/Mark Blinch (AUSTRALIA - Tags: SPORT TENNIS)

Kimiko Date-Krumm of Japan reacts during her women's singles match against Eleni Daniilidou of Greece at the Australian Open tennis tournament in Melbourne January 16, 2012. REUTERS/Mark Blinch (AUSTRALIA - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece hits a return to Kimiko Date-Krumm of Japan during their women's singles match at the Australian Open tennis tournament in Melbourne January 16, 2012. REUTERS/Mark Blinch (AUSTRALIA - Tags: SPORT TENNIS)

Kimiko Date-Krumm of Japan hits a return to Eleni Daniilidou of Greece
during their women's singles match at the Australian Open tennis tournament in Melbourne January 16, 2012. REUTERS/Mark Blinch (AUSTRALIA - Tags: SPORT TENNIS)

Ana Ivanovic of Serbia hits a return to Eleni Daniilidou of Greece at the Wimbledon tennis championships in London June 23, 2011. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT TENNIS)

Ana Ivanovic of Serbia reacts during her match against Eleni Daniilidou of Greece at the Wimbledon tennis championships in London June 23, 2011. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT TENNIS)

Ana Ivanovic of Serbia hits a return to Eleni Daniilidou of Greece at the Wimbledon tennis championships in London June 23, 2011. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT TENNIS)

Ana Ivanovic of Serbia hits a return to Eleni Daniilidou of Greece at the Wimbledon tennis championships in London June 23, 2011. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT TENNIS)

Ana Ivanovic of Serbia hits a return to Eleni Daniilidou of Greece at the Wimbledon tennis championships in London June 23, 2011. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT TENNIS)

Ana Ivanovic of Serbia follows through on a shot during her match against Eleni Daniilidou of Greece at the Wimbledon tennis championships in London June 23, 2011. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT TENNIS)

Ana Ivanovic of Serbia serves to Eleni Daniilidou of Greece at the Wimbledon tennis championships in London June 23, 2011. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT TENNIS)

Aleksandra Wozniak of Canada hits a return to Eleni Daniilidou of Greece at the 2010 Wimbledon Tennis Championships in London June 21, 2010. REUTERS/Suzanne Plunkett (BRITAIN - Tags: SPORT TENNIS)

Eleni Daniilidou of Greece hits a return to Aleksandra Wozniakof Canada at the 2010 Wimbledon Tennis Championships in London June 21, 2010. REUTERS/Suzanne Plunkett (BRITAIN - Tags: SPORT TENNIS)

Aleksandra Wozniak of Canada hits a return to Eleni Daniilidou of Greece at the 2010 Wimbledon Tennis Championships in London June 21, 2010. REUTERS/Suzanne Plunkett (BRITAIN - Tags: SPORT TENNIS)

Russia's Maria Sharapova hits the ball against Greece's Eleni Daniilidou during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova runs down the ball during her match against Greece's Eleni Daniilidou at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova hits the ball against Greece's Eleni Daniilidou during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova follows through on a shot against Greece's Eleni Daniilidou during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova hits the ball against Greece's Eleni Daniilidou during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Greece's Eleni Daniilidou reacts to losing a point against Russia's Maria Sharapova during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Greece's Eleni Daniilidou hits the ball against Russia's Maria Sharapova during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Greece's Eleni Daniilidou sits during a changeover in her match against Russia's Maria Sharapova at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova serves the ball to Greece's Eleni Daniilidou during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova hits the ball against Greece's Eleni Daniilidou during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova celebrates winning a point during her victory over Greece's Eleni Daniilidou at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Greece's Eleni Daniilidou hits the ball against Russia's Maria Sharapova during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova celebrates winning a point during her victory over Greece's Eleni Daniilidou at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova hits a volley at the the net against Greece's Eleni Daniilidou during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova hits the ball against Greece's Eleni Daniilidou during their match at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

Russia's Maria Sharapova celebrates winning a point during her match against Greece's Eleni Daniilidou at the Pacific Life Open tennis tournament in Indian Wells, California March 16, 2008. REUTERS/Danny Moloshok (UNITED STATES)

France's Amelie Mauresmo serves to Greece's Eleni Daniilidou in the Paris Open tennis tournament February 7, 2008. Daniilidou withdrew after 3 games. REUTERS/Philippe Wojazer (FRANCE)

France's Amelie Mauresmo serves to Greece's Eleni Daniilidou in the Paris Open tennis tournament, February 7, 2008. Daniilidou withdrew after 3 games. REUTERS/Philippe Wojazer (FRANCE)

France's Amelie Mauresmo returns the ball to Greece's Eleni Daniilidou in the Paris Open tennis tournament February 7, 2008. Daniilidou withdrew after 3 games. REUTERS/Philippe Wojazer (FRANCE)