We followed the No. 1,700-ranked tennis player in the world to get an inside look at tennis' minor leagues - MarketWatch
Novak Djokovic, Hampered by Injury, Is Out of the U.S. Open - The New York Times
Pete Sampras | Biography, Titles, & Facts | Britannica
Pete Sampras - Wikipedia
Kim Clijsters Announces (Another) Return to Tennis - The New York Times
Wawrinka Stops Defending Champion Djokovic, Who Retires at US Open - Tennis Now
ESPN Serves First Ball to Last Ball Exclusively at the US Open - ESPN Press Room U.S.
Maria Sharapova retires from tennis at age 32 - Los Angeles Times
Sharapova retires from tennis at age 32 with 5 Slam titles
Former No. 1 Kim Clijsters, now 36 years old, planning return to tennis | CBC Sports
Angelique Kerber: Is this the beginning of the end? | Sports| German football and major international sports news | DW | 27.08.2019
Retired Us Tennis Champions Andre High Resolution Stock Photography and Images - Alamy
50 Champions of the US Open | 50th Anniversary - Official Site of the 2020 US Open Tennis Championships - A USTA Event
I Still Have The Same Passion For Tennis": Kim Clijsters Ready For US Open 2020 - EssentiallySports
US Open 2019: Novak Djokovic retires with injury, Stan Wawrinka reaches quarter-finals - Sports News
Retired US tennis champions Andre Agassi and Pete Sampras open a free Stock Photo - Alamy
Retired US Open Champion Flavia Pennetta Hints at Rio Return, Minus Fabio Fognini | Tennis News
Nadal retirement sends '09 champ del Potro back to US Open final - Official Site of the 2020 US Open Tennis Championships - A USTA Event
John McEnroe - Wikipedia
Russian Tennis Star Sharapova, 5-Time Grand Slam Champion, Retires - The Moscow Times
Bryan Brothers Will Retire From Tennis After 2020 U.S. Open - The New York Times
Out of retirement, Clijsters is back on the scene for the first time since 2012
Tracy Austin - Wikipedia
Best American Tennis Players | List of Famous Tennis Players from United States
Kim Clijsters - Wikipedia
I Wasn't Ready for it": Serena Williams Reacts to Bryan Brothers' Retirement - EssentiallySports
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2019 US Open: 15-year-old Coco Gauff has become tennis's biggest story - Vox
