Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Russia's Svetlana Kuznetsova hits a shot during her Women's singles first round match against Colombia's Mariana Duque-Marino. REUTERS/Issei Kato 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Russia's Svetlana Kuznetsova shakes hands as she celebrates winning her Women's singles first round match against Colombia's Mariana Duque-Marino. REUTERS/Issei Kato 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Russia's Svetlana Kuznetsova celebrates winning her Women's singles first round match against Colombia's Mariana Duque-Marino. REUTERS/Issei Kato 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Russia's Svetlana Kuznetsova celebrates her Women's singles first round match against Colombia's Mariana Duque-Marino. REUTERS/Issei Kato 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Russia's Svetlana Kuznetsova hits a shot during her Women's singles first round match against Colombia's Mariana Duque-Marino.REUTERS/Issei Kato 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Colombia's Mariana Duque-Marino hits a shot during her Women's singles first round match against Russia's Svetlana Kuznetsova. REUTERS/Issei Kato 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Russia's Svetlana Kuznetsova serves during her Women's singles first round match against Colombia's Mariana Duque-Marino. REUTERS/Issei Kato 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Russia's Svetlana Kuznetsova serves during her Women's singles first round match against Colombia's Mariana Duque-Marino. REUTERS/Issei Kato 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Colombia's Mariana Duque-Marino hits a shot during her Women's singles first round match against Russia's Svetlana Kuznetsova. REUTERS/Issei Kato 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 16/1/17 Russia's Svetlana Kuznetsova serves during her Women's singles first round match against Colombia's Mariana Duque-Marino. REUTERS/Issei Kato 

Andrea Petkovic of Germany celebrates after winning her match against Mariana Duque-Marino at the Wimbledon Tennis Championships in London, July 1, 2015. REUTERS/Henry Browne 

Andrea Petkovic of Germany celebrates after winning her match against Mariana Duque-Marino at the Wimbledon Tennis Championships in London, July 1, 2015. REUTERS/Henry Browne 

Andrea Petkovic of Germany shakes the hand of Mariana Duque-Marino after winning their match at the Wimbledon Tennis Championships in London, July 1, 2015. REUTERS/Henry Browne 

Andrea Petkovic of Germany hits the ball during her match against Mariana Duque-Marino at the Wimbledon Tennis Championships in London, July 1, 2015. REUTERS/Henry Browne 

Andrea Petkovic of Germany hits the ball during her match against Mariana Duque-Marino at the Wimbledon Tennis Championships in London, July 1, 2015. REUTERS/Henry Browne 

Andrea Petkovic of Germany hits the ball during her match against Mariana Duque-Marino at the Wimbledon Tennis Championships in London, July 1, 2015. REUTERS/Henry Browne 

Andrea Petkovic of Germany hits the ball during her match against Mariana Duque-Marino at the Wimbledon Tennis Championships in London, July 1, 2015. REUTERS/Henry Browne 

Naomi Broady of Britain plays a shot during her match against Mariana Duque-Mariono of Colombia at the Wimbledon Tennis Championships in London, June 29, 2015. REUTERS/Henry Browne

Mariana Duque-Mariono of Colombia celebrates after winning her match against Naomi Broady of Britain at the Wimbledon Tennis Championships in London, June 29, 2015. REUTERS/Henry Browne

Naomi Broady of Britain plays a shot during her match against Mariana Duque-Mariono of Colombia at the Wimbledon Tennis Championships in London, June 29, 2015. REUTERS/Henry Browne

Naomi Broady of Britain serves during her match against Mariana Duque-Mariono of Colombia at the Wimbledon Tennis Championships in London, June 29, 2015. REUTERS/Henry Browne

Naomi Broady of Britain serves during her match against Mariana Duque-Mariono of Colombia at the Wimbledon Tennis Championships in London, June 29, 2015. REUTERS/Henry Browne

Mariana Duque-Marino of Colombia returns the ball to Maria Sharapova of Russia during their match at the Madrid Open tennis tournament in Madrid, Spain, May 5, 2015. REUTERS/Juan Medina 

Mariana Duque-Marino of Colombia returns the ball to Maria Sharapova of Russia during their match at the Madrid Open tennis tournament in Madrid, Spain, May 5, 2015. REUTERS/Juan Medina 

Mariana Duque-Marino of Colombia returns the ball to Maria Sharapova of Russia during their match at the Madrid Open tennis tournament in Madrid, Spain, May 5, 2015. REUTERS/Juan Medina 

Maria Sharapova of Russia returns the ball to Mariana Duque-Marino of Colombia during their match at the Madrid Open tennis tournament in Madrid, Spain, May 5, 2015. REUTERS/Juan Medina 

Maria Sharapova of Russia returns the ball to Mariana Duque-Marino of Colombia during their match at the Madrid Open tennis tournament in Madrid, Spain, May 5, 2015. REUTERS/Juan Medina 

Maria Sharapova of Russia returns the ball to Mariana Duque-Marino of Colombia during their match at the Madrid Open tennis tournament in Madrid, Spain, May 5, 2015. REUTERS/Juan Medina 

Maria Sharapova of Russia celebrates a point against Mariana Duque-Marino of Colombia during their match at the Madrid Open tennis tournament in Madrid, Spain, May 5, 2015. REUTERS/Juan Medina 

Laura Robson of Britain hits a return to Mariana Duque-Marino of Colombia during their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain reacts during her women's singles tennis match against Mariana Duque-Marino of Colombia at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain celebrates after defeating Mariana Duque-Marino of Colombia in their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain reacts during her women's singles tennis match against Mariana Duque-Marino of Colombia at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Mariana Duque-Marino of Colombia reacts during her women's singles tennis match against Laura Robson of Britain at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain hits a return to Mariana Duque-Marino of Colombia during their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain serves to Mariana Duque-Marino of Colombia during their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain reacts during her women's singles tennis match against Mariana Duque-Marino of Colombia at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain hits a return to Mariana Duque-Marino of Colombia during their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain hits a return to Mariana Duque-Marino of Colombia during their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Mariana Duque-Marino of Colombia hits a return to Laura Robson of Britain during their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain hits a return to Mariana Duque-Marino of Colombia during their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain hits a return to Mariana Duque-Marino of Colombia during their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Laura Robson of Britain hits a return to Mariana Duque-Marino of Colombia during their women's singles tennis match at the Wimbledon Tennis Championships, in London June 28, 2013. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT TENNIS)

Marion Bartoli of France hits a return to Mariana Duque-Marino of Colombia during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. Bartoli beat Duque-Marino 7-6(5) 7-5. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS TPX IMAGES OF THE DAY)

Marion Bartoli of France is pictured during her women's singles match against Mariana Duque-Marino of Colombia at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. Bartoli beat Duque-Marino 7-6(5) 7-5. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Mariana Duque-Marino of Colombia hits a return to Marion Bartoli of France during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. Duque-Marino lost the match to Bartoli. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Marion Bartoli of France hits a return to Mariana Duque-Marino of Colombia during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. Bartoli beat Duque-Marino 7-6(5) 7-5. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Marion Bartoli of France celebrates defeating Mariana Duque-Marino of Colombia in their women's singles match during the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Marion Bartoli of France celebrates defeating Mariana Duque-Marino of Colombia in their women's singles match during the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Marion Bartoli of France reacts during her women's singles match against Mariana Duque-Marino of Colombia at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

A ball boy holds tennis balls during the women's singles match between Marion Bartoli of France and Mariana Duque-Marino of Colombia at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

A close up shows the racket of Mariana Duque-Marino of Colombia and tennis balls as she prepares to serves to Marion Bartoli of France during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Mariana Duque-Marino of Colombia hits a return to Marion Bartoli of France during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Marion Bartoli of France hits a return to Mariana Duque-Marino of Colombia during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Mariana Duque-Marino of Colombia hits a return to Marion Bartoli of France during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Mariana Duque-Marino of Colombia serves to Marion Bartoli of France during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS TPX IMAGES OF THE DAY)

Mariana Duque-Marino of Colombia hits a return to Marion Bartoli of France during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Mariana Duque-Marino of Colombia serves to Marion Bartoli of France during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Marion Bartoli of France serves to Mariana Duque-Marino of Colombia during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)

Mariana Duque-Marino of Colombia hits a return to Marion Bartoli of France during their women's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 31, 2013. REUTERS/Vincent Kessler (FRANCE - Tags: SPORT TENNIS)