![Steffi Graf (L) and her son Jaden Agassi watch Andre Agassi play Roger Federer of Switzerland, in their quarter final match at the 2004 U.S. Open in New York, September 9, 2004. Steffi Graf (L) and her son Jaden Agassi watch Andre Agassi play Roger Federer of Switzerland, in their quarter final match at the 2004 U.S. Open in New York, September 9, 2004.](https://c8.alamy.com/comp/2D3WX60/steffi-graf-l-and-her-son-jaden-agassi-watch-andre-agassi-play-roger-federer-of-switzerland-in-their-quarter-final-match-at-the-2004-us-open-in-new-york-september-9-2004-federer-defeated-agassi-6-3-2-6-7-5-3-6-6-3-reutersmike-segar-pj-2D3WX60.jpg)
Steffi Graf (L) and her son Jaden Agassi watch Andre Agassi play Roger Federer of Switzerland, in their quarter final match at the 2004 U.S. Open in New York, September 9, 2004.
Former champion German Steffi Graf watches boyfriend Andre Agassi of... Nachrichtenfoto - Getty Images
![Australian Open champion Martina Hingis of Switzerland juggles balls as Steffi Graf of Germany has medical time-out during the third set in their quarterfinals in the one million dollar Pan Pacific Open Australian Open champion Martina Hingis of Switzerland juggles balls as Steffi Graf of Germany has medical time-out during the third set in their quarterfinals in the one million dollar Pan Pacific Open](https://c8.alamy.com/comp/2D5597E/australian-open-champion-martina-hingis-of-switzerland-juggles-balls-as-steffi-graf-of-germany-has-medical-time-out-during-the-third-set-in-their-quarterfinals-in-the-one-million-dollar-pan-pacific-open-tennis-in-tokyo-february-5-hingis-beat-graf-3-6-6-2-6-4-to-advance-into-semifinals-kmdlfms-2D5597E.jpg)
Australian Open champion Martina Hingis of Switzerland juggles balls as Steffi Graf of Germany has medical time-out during the third set in their quarterfinals in the one million dollar Pan Pacific Open
![Steffi Graf of Germany displays her trophy as she celebrates her victory against Martina Hingis of Switzerland at Roland Garros in the French tennis Open Women's final June 5. Graf defeated Hingis Steffi Graf of Germany displays her trophy as she celebrates her victory against Martina Hingis of Switzerland at Roland Garros in the French tennis Open Women's final June 5. Graf defeated Hingis](https://c8.alamy.com/comp/2D59GXD/steffi-graf-of-germany-displays-her-trophy-as-she-celebrates-her-victory-against-martina-hingis-of-switzerland-at-roland-garros-in-the-french-tennis-open-womens-final-june-5-graf-defeated-hingis-4-6-7-5-6-2-jdjdp-2D59GXD.jpg)
Steffi Graf of Germany displays her trophy as she celebrates her victory against Martina Hingis of Switzerland at Roland Garros in the French tennis Open Women's final June 5. Graf defeated Hingis
![Former tennis players Andre Agassi and Steffi Graf sit on Centre Court for the men's quarter-final tennis match between Roger Federer of Switzerland and Mikhail Youzhny of Russia at the Wimbledon tennis Former tennis players Andre Agassi and Steffi Graf sit on Centre Court for the men's quarter-final tennis match between Roger Federer of Switzerland and Mikhail Youzhny of Russia at the Wimbledon tennis](https://c8.alamy.com/comp/2CYKM9N/former-tennis-players-andre-agassi-and-steffi-graf-sit-on-centre-court-for-the-mens-quarter-final-tennis-match-between-roger-federer-of-switzerland-and-mikhail-youzhny-of-russia-at-the-wimbledon-tennis-championships-in-london-july-4-2012-reutersdylan-martinez-britain-tags-sport-tennis-2CYKM9N.jpg)