Italy's Sara Errani waves at supporters after beating Serbia's Jelena Jankovic during their WTA Championships tennis match in Istanbul on October 25, 2013. AFP PHOTO / BULENT KILIC
Credit: BULENT KILIC
Jelena Jankovic of Serbia after falling over during her semi final match against Ana Ivanovic of Serbia on day six of the Porsche Tennis Grand Prix at Porsche Arena on April 26, 2014 in Stuttgart, Germany.
Credit: Adam Pretty
Jelena Jankovic attends the Stella Artois Wimbledon 2014 official launch party at Cannizaro House on June 21, 2014 in London, England. Stella Artois is the official beer of The Championships Wimbledon.
Credit: David M. Benett
Jelena Jankovic of Serbia arrives at the 2014 Australian Open player party at The Spice Markets on January 10, 2014 in Melbourne, Australia.
Credit: Robert Prezioso
Jelena Jankovic of Serbia celebrates in her match against Simona Halep of Romania in the final during day fourteen of the BNP Paribas Open tennis at the Indian Wells Tennis Garden on March 22, 2015 in Indian Wells, California.
Credit: Julian Finney
Jelena Jankovic of Serbia returns a shot during her women's singles match against Kurumi Nara of Japan on day five of the French Open at Roland Garros on May 29, 2014 in Paris, France.
Credit: Clive Brunskill
Jelena Jankovic of Serbia hits a backhand during her semi final match against Ana Ivanovic of Serbia on day six of the Porsche Tennis Grand Prix at Porsche Arena on April 26, 2014 in Stuttgart, Germany.