Members of the Tokyo 2020 Emblems Selection Committee, including former tennis player Ai Sugiyama (L) and Aki Taguchi (C), unveil four shortlisted emblem designs for the Tokyo 2020 Olympic and Paralympic Games in Tokyo, Japan April 8, 2016. REUTERS/Toru Hanai

Members of the Tokyo 2020 Emblems Selection Committee, former tennis player Ai Sugiyama (L) and Aki Taguchi, look at four shortlisted emblem designs for the Tokyo 2020 Olympic and Paralympic Games after unveiling them in Tokyo, Japan April 8, 2016. REUTERS/Toru Hanai

Alisa Kleybanova (L) of Russia looks on as her team-mate Francesca Schiavone of Italy returns the ball to Japan's Ai Sugiyama and Daniela Hantuchova of Slovakia during their final doubles match at the Pan Pacific Open tennis tournament in Tokyo October 3, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS)

Ai Sugiyama of Japan waves as she bids farewell to fans after her final doubles match at the Pan Pacific Open tennis tournament in Tokyo October 3, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS IMAGES OF THE DAY)

Japanese tennis player Ai Sugiyama is mobbed by the media as she flashes a thumbs up after her final doubles match at the Pan Pacific Open tennis tournament in Tokyo October 3, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS)

Alisa Kleybanova (C) of Russia and her team-mate Francesca Schiavone of Italy stand next to a Japanese woman clad in a kimono during an award ceremony after their final doubles match against Japan's Ai Sugiyama and Daniela Hantuchova of Slovakia at the Pan Pacific Open tennis tournament in Tokyo October 3, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS IMAGES OF THE DAY)

Ai Sugiyama (L) of Japan celebrates with her team mate Daniela Hantuchova of Slovakia during the doubles quarter-final match against Spain's Anabel Medina Garrigues and Virginia Ruano Pascual at the Pan Pacific Open tennis tournament in Tokyo October 1, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS)

Ai Sugiyama (L) of Japan returns the ball next to her team mate Daniela Hantuchova during the doubles quarter-final match against Spain's Anabel Medina Garrigues and Virginia Ruano Pascual at the Pan Pacific Open tennis tournament in Tokyo October 1, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS)

Ai Sugiyama (R) of Japan waves as she leaves with her team mate Daniela Hantuchova after defeating Spain's Anabel Medina Garrigues and Virginia Ruano Pascual at their doubles quarter-final match at the Pan Pacific Open tennis tournament in Tokyo October 1, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS)

Japan's Ai Sugiyama acknowledges the crowd as she leaves the court after withdrawing from the first round match against Nadia Petrova of Russia during the Pan Pacific Open tennis tournament in Tokyo September 28, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS)

Japan's Ai Sugiyama prepares to leave the court after withdrawing the first round match against Nadia Petrova of Russia at the Pan Pacific Open tennis tournament in Tokyo September 28, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS)

Nadia Petrova of Russia returns the ball against Japan's Ai Sugiyama during their first round match at the Pan Pacific Open tennis tournament in Tokyo September 28, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS)

Japan's Ai Sugiyama crouches during the first round match against Nadia Petrova of Russia at the Pan Pacific Open tennis tournament in Tokyo September 28, 2009. REUTERS/Yuriko Nakao (JAPAN SPORT TENNIS IMAGES OF THE DAY)

Ai Sugiyama of Japan smiles during a news conference for the Pan Pacific Open tennis tournament in Tokyo September 25, 2009. REUTERS/Toru Hanai (JAPAN SPORT TENNIS)

Dinara Safina of Russia, Ai Sugiyama of Japan, Ayumi Morita of Japan and Venus Williams of the U.S. (L-R) pose at the end of a news conference for the Pan Pacific Open tennis tournament in Tokyo September 25, 2009. REUTERS/Toru Hanai (JAPAN)

Ai Sugiyama of Japan returns a shot to Samantha Stosur of Australia at the U.S. Open tennis tournament in New York, August 31, 2009. REUTERS/Shaun Best (UNITED STATES SPORT TENNIS)

Samantha Stosur of Australia makes a return to Ai Sugiyama of Japan at the U.S. Open tennis tournament in New York, August 31, 2009. REUTERS/Shaun Best (UNITED STATES SPORT TENNIS)

Ai Sugiyama of Japan plays a shot to Samantha Stosur of Australia at the U.S. Open tennis tournament in New York, August 31, 2009. REUTERS/Shaun Best (UNITED STATES SPORT TENNIS)

Ai Sugiyama of Japan plays a shot to Samantha Stosur of Australia at the U.S. Open tennis tournament in New York August 31, 2009. REUTERS/Shaun Best (UNITED STATES SPORT TENNIS)

Ai Sugiyama of Japan plays a shot to Samantha Stosur of Australia at the U.S. Open tennis tournament in New York August 31, 2009. REUTERS/Shaun Best (UNITED STATES SPORT TENNIS)

Ai Sugiyama of Japan returns the ball to Daniela Hantuchova of Slovakia during their match at the Wimbledon tennis championships, in London June 26, 2009. REUTERS/Kieran Doherty (BRITAIN SPORT TENNIS)

Ai Sugiyama of Japan returns the ball to Daniela Hantuchova of Slovakia during their match at the Wimbledon tennis championships, in London June 26, 2009. REUTERS/Kieran Doherty (BRITAIN SPORT TENNIS)

Ai Sugiyama of Japan runs to the ball during her match against Daniela Hantuchova of Slovakia at the Wimbledon tennis championships, in London June 26, 2009. REUTERS/Kieran Doherty (BRITAIN SPORT TENNIS)

Ai Sugiyama of Japan serves to Daniela Hantuchova of Slovakia during their match at the Wimbledon tennis championships, in London June 26, 2009. REUTERS/Kieran Doherty (BRITAIN SPORT TENNIS)

Daniela Hantuchova of Slovakia returns the ball to Ai Sugiyama of Japan during their match at the Wimbledon tennis championships, in London June 26, 2009. REUTERS/Kieran Doherty (BRITAIN SPORT TENNIS)

Ai Sugiyama of Japan returns the ball to Arantxa Parra Santonja of Spain at the Wimbledon tennis championships, in London June 24, 2009. REUTERS/Eddie Keogh (BRITAIN SPORT TENNIS)

Ai Sugiyama of Japan returns the ball to Arantxa Parra Santonja of Spain at the Wimbledon tennis championships, in London June 24, 2009. REUTERS/Eddie Keogh (BRITAIN SPORT TENNIS)

Ai Sugiyama of Japan returns the ball to Arantxa Parra Santonja of Spain at the Wimbledon tennis championships, in London June 24, 2009. REUTERS/Eddie Keogh (BRITAIN SPORT TENNIS)

Ai Sugiyama of Japan returns the ball to Arantxa Parra Santonja of Spain at the Wimbledon tennis championships, in London June 24, 2009. REUTERS/Eddie Keogh (BRITAIN SPORT TENNIS)

Arantxa Parra Santonja of Spain returns the ball to Ai Sugiyama of Japan at the Wimbledon tennis championships, in London June 24, 2009. REUTERS/Eddie Keogh (BRITAIN SPORT TENNIS)

Arantxa Parra Santonja of Spain returns the ball to Ai Sugiyama of Japan at the Wimbledon tennis championships, in London June 24, 2009. REUTERS/Eddie Keogh (BRITAIN SPORT TENNIS)

Arantxa Parra Santonja of Spain returns the ball to Ai Sugiyama of Japan at the Wimbledon tennis championships, in London June 24, 2009. REUTERS/Eddie Keogh (BRITAIN SPORT TENNIS)

Ai Sugiyama of Japan returns the ball to Patty Schnyder of Switzerland during their match at the Wimbledon tennis championships, in London June 22, 2009. REUTERS/Kieran Doherty (BRITAIN SPORT TENNIS)

Ai Sugiyama of Japan returns the ball to Patty Schnyder of Switzerland during their match at the Wimbledon tennis championships, in London June 22, 2009. REUTERS/Kieran Doherty (BRITAIN SPORT TENNIS)

Peng Shuai of China (R) celebrates with doubles partner Hsieh Su-wei of Taiwan after defeating Slovakia's Daniela Hantuchova and Japan's Ai Sugiyama at the French Open tennis tournament at Roland Garros in Paris May 30, 2009. REUTERS/Regis Duvignau (FRANCE SPORT TENNIS)

Peng Shuai of China (R) celebrates with doubles partner Hsieh Su-wei of Taiwan after defeating Slovakia's Daniela Hantuchova and Japan's Ai Sugiyama at the French Open tennis tournament at Roland Garros in Paris May 30, 2009 REUTERS/Regis Duvignau (FRANCE SPORT TENNIS)

Ai Sugiyama of Japan serves to Aravane Rezai of France during the French Open tennis tournament at Roland Garros in Paris May 25, 2009. REUTERS/Bogdan Cristel (FRANCE SPORT TENNIS)

Ai Sugiyama of Japan serves to Aravane Rezai of France during the French Open tennis tournament at Roland Garros in Paris May 25, 2009. REUTERS/Bogdan Cristel (FRANCE SPORT TENNIS)

Aravane Rezai of France serves to Ai Sugiyama of Japan during the French Open tennis tournament at Roland Garros in Paris May 25, 2009. REUTERS/Bogdan Cristel (FRANCE SPORT TENNIS)

Ai Sugiyama of Japan returns the ball to Aravane Rezai of France during the French Open tennis tournament at Roland Garros in Paris May 25, 2009. REUTERS/Bogdan Cristel (FRANCE SPORT TENNIS)

Aravane Rezai of France reacts after winning her match against Ai Sugiyama of Japan at the French Open tennis tournament at Roland Garros in Paris May 25, 2009. REUTERS/Bogdan Cristel (FRANCE)

Ai Sugiyama of Japan serves the ball to Amelie Mauresmo of France during their first round match at the Madrid Open tennis tournament May 11, 2009. REUTERS/Paul Hanna (SPAIN SPORT TENNIS)

Amelie Mauresmo of France serves the ball to Ai Sugiyama of Japan during their first round match at the Madrid Open tennis tournament May 11, 2009. REUTERS/Paul Hanna (SPAIN SPORT TENNIS)

Amelie Mauresmo of France returns the ball to Ai Sugiyama of Japan during their first round match at the Madrid Open tennis tournament May 11, 2009. REUTERS/Paul Hanna (SPAIN SPORT TENNIS)

Amelie Mauresmo of France serves the ball to Ai Sugiyama of Japan during their first round match at the Madrid Open tennis tournament May 11, 2009. REUTERS/Paul Hanna (SPAIN SPORT TENNIS)

Alize Cornet of France returns a shot to Ai Sugiyama of Japan during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Ai Sugiyama of Japan returns a shot to Alize Cornet of France during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Ai Sugiyama of Japan returns a shot to Alize Cornet of France during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Alize Cornet of France reacts as she challenges a call during her match against Ai Sugiyama of Japan at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Alize Cornet of France returns a shot to Ai Sugiyama of Japan during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Alize Cornet of France returns a shot to Ai Sugiyama of Japan during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Ai Sugiyama of Japan returns a shot to Alize Cornet of France during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Ai Sugiyama of Japan returns a shot to Alize Cornet of France during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Ai Sugiyama of Japan returns a shot to Alize Cornet of France during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Ai Sugiyama of Japan returns a shot to Alize Cornet of France during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY)

Ai Sugiyama of Japan serves to Alize Cornet of France during their match at the Rome Masters tennis tournament May 4, 2009. REUTERS/Max Rossi (ITALY SPORT TENNIS)

Japan's Ai Sugiyama returns a shot next to her team mate Ayumi Morita during their Fed Cup World Group II playoff double tennis match against Poland in Gdynia April 26, 2009. REUTERS/Kacper Pempel (POLAND SPORT TENNIS)

Japan's Ai Sugiyama looks at her team mate Ayumi Morita (R) during their Fed Cup World Group II playoff doubles tennis match against Poland in Gdynia April 26, 2009. REUTERS/Kacper Pempel(POLAND SPORT TENNIS)

Japan's Ai Sugiyama returns a shot as her team mate Ayumi Morita looks on during their Fed Cup world group II play-off double tennis match against Poland in Gdynia April 26, 2009. REUTERS/Kacper Pempel (POLAND SPORT TENNIS)

Poland's Agnieszka Radwanska returns a ball to Japan's Ai Sugiyama during second day of the Fed Cup world group II play-off tennis match between Poland and Japan in Gdynia, April 26, 2009. REUTERS/Kacper Pempel (POLAND SPORT TENNIS)