Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 20, 2019 Serbia's Janko Tipsarevic and Viktor Troicki celebrate during their doubles match against Japan's Ben McLachlan and Yasutaka Uchiyama REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 20, 2019 Japan's Ben McLachlan and Yasutaka Uchiyama in action during their doubles match against Serbia's Janko Tipsarevic and Viktor Troicki REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 20, 2019 Serbia's Janko Tipsarevic and Viktor Troicki in action during their doubles match against Japan's Ben McLachlan and Yasutaka Uchiyama REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 20, 2019 Serbia's Janko Tipsarevic and Viktor Troicki in action during their doubles match against Japan's Ben McLachlan and Yasutaka Uchiyama REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 20, 2019 Serbia's Janko Tipsarevic and Viktor Troicki celebrate during their doubles match against Japan's Ben McLachlan and Yasutaka Uchiyama REUTERS/Susana Vera 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 General view of spectators during the second round match between South Africa's Kevin Anderson and Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 South Africa's Kevin Anderson in action during his second round match against Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 General view of spectators during the second round match between South Africa's Kevin Anderson and Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 General view of a spectator during the second round match between South Africa's Kevin Anderson and Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 South Africa's Kevin Anderson in action during his second round match against Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 South Africa's Kevin Anderson in action during his second round match against Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 South Africa's Kevin Anderson in action during his second round match against Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 South Africa's Kevin Anderson celebrates winning his second round match against Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 South Africa's Kevin Anderson celebrates winning his second round match against Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 South Africa's Kevin Anderson celebrates winning his second round match against Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien TPX IMAGES OF THE DAY 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 South Africa's Kevin Anderson during his second round match against Serbia's Janko Tipsarevic REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 General view of Serbia's Janko Tipsarevic during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 3, 2019 Serbia's Janko Tipsarevic in action during his second round match against South Africa's Kevin Anderson REUTERS/Tony O'Brien 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 General view of the tattoos on Serbia's Janko Tipsarevic's leg during his first round match against Japan's Yoshihito Nishioka REUTERS/Toby Melville 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 Serbia's Janko Tipsarevic in action during his first round match against Japan's Yoshihito Nishioka REUTERS/Toby Melville 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 Serbia's Janko Tipsarevic in action during his first round match against Japan's Yoshihito Nishioka REUTERS/Toby Melville 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 Serbia's Janko Tipsarevic during his first round match against Japan's Yoshihito Nishioka REUTERS/Toby Melville 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 Serbia's Janko Tipsarevic in action during his first round match against Japan's Yoshihito Nishioka REUTERS/Toby Melville 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 Japan's Yoshihito Nishioka in action during his first round match against Serbia's Janko Tipsarevic REUTERS/Toby Melville 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 Japan's Yoshihito Nishioka reacts during his first round match against Serbia's Janko Tipsarevic REUTERS/Toby Melville 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 Japan's Yoshihito Nishioka in action during his first round match against Serbia's Janko Tipsarevic REUTERS/Toby Melville 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 Serbia's Janko Tipsarevic in action during his first round match against Japan's Yoshihito Nishioka REUTERS/Toby Melville 

Tennis - Wimbledon - All England Lawn Tennis and Croquet Club, London, Britain - July 1, 2019 Japan's Yoshihito Nishioka in action during his first round match against Serbia's Janko Tipsarevic REUTERS/Toby Melville 

Tennis - French Open - Roland Garros, Paris, France - May 26, 2019 Serbia's Janko Tipsarevic in action during his first round match against Bulgaria's Grigor Dimitrov REUTERS/Vincent Kessler 

Tennis - French Open - Roland Garros, Paris, France - May 26, 2019 Serbia's Janko Tipsarevic in action during his first round match against Bulgaria's Grigor Dimitrov REUTERS/Vincent Kessler 

Tennis - French Open - Roland Garros, Paris, France - May 26, 2019 Serbia's Janko Tipsarevic in action during his first round match against Bulgaria's Grigor Dimitrov REUTERS/Vincent Kessler 

Tennis - French Open - Roland Garros, Paris, France - May 26, 2019 Bulgaria's Grigor Dimitrov in action during his first round match against Serbia's Janko Tipsarevic REUTERS/Vincent Kessler 

Tennis - French Open - Roland Garros, Paris, France - May 26, 2019 Bulgaria's Grigor Dimitrov in action during his first round match against Serbia's Janko Tipsarevic REUTERS/Vincent Kessler 

Tennis - French Open - Roland Garros, Paris, France - May 26, 2019 Serbia's Janko Tipsarevic in action during his first round match against Bulgaria's Grigor Dimitrov REUTERS/Vincent Kessler 

Tennis - French Open - Roland Garros, Paris, France - May 26, 2019 Bulgaria's Grigor Dimitrov during his first round match against Serbia's Janko Tipsarevic REUTERS/Vincent Kessler 

Tennis - French Open - Roland Garros, Paris, France - May 26, 2019 Serbia's Janko Tipsarevic in action during his first round match against Bulgaria's Grigor Dimitrov REUTERS/Vincent Kessler 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Bulgaria's Grigor Dimitrov in action during the match against Serbia's Janko Tipsarevic. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Bulgaria's Grigor Dimitrov in action during the match against Serbia's Janko Tipsarevic. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Bulgaria's Grigor Dimitrov shakes hands with Serbia's Janko Tipsarevic after winning the match. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Bulgaria's Grigor Dimitrov celebrates winning match point during the match against Serbia's Janko Tipsarevic. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Bulgaria's Grigor Dimitrov reacts during the match against Serbia's Janko Tipsarevic. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Serbia's Janko Tipsarevic uses an ice pack during the match against Bulgaria's Grigor Dimitrov. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Serbia's Janko Tipsarevic in action during the match against Bulgaria's Grigor Dimitrov. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Bulgaria's Grigor Dimitrov look on during the match against Serbia's Janko Tipsarevic. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Serbia's Janko Tipsarevic reacts during the match against Bulgaria's Grigor Dimitrov. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Bulgaria's Grigor Dimitrov in action during the match against Serbia's Janko Tipsarevic. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Bulgaria's Grigor Dimitrov looks on during the match against Serbia's Janko Tipsarevic. REUTERS/Edgar Su 

Tennis - Australian Open - First Round - 1573 Arena, Melbourne, Australia, January 14, 2019. Serbia's Janko Tipsarevic looks on during the match against Bulgaria's Grigor Dimitrov. REUTERS/Edgar Su 

Tennis - Japan Open men's Singles Round 2 match - Ariake Coliseum, Tokyo, Japan - 06/10/16. Ivo Karlovic of Croatia returns a ball to Janko Tipsarevic of Serbia. REUTERS/Kim Kyung-Hoon