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![New York, USA. 7th September 2018. US Open Tennis: Argentina's Juan Martin del Potro serving to Spain's Rafael Nadal, during their semifinal match at the US Open in Flushing Meadows, New York. New York, USA. 7th September 2018. US Open Tennis: Argentina's Juan Martin del Potro serving to Spain's Rafael Nadal, during their semifinal match at the US Open in Flushing Meadows, New York.](https://c8.alamy.com/comp/PJJW21/new-york-usa-7th-september-2018-us-open-tennis-argentinas-juan-martin-del-potro-serving-to-spains-rafael-nadal-during-their-semifinal-match-at-the-us-open-in-flushing-meadows-new-york-nadal-retired-after-the-second-set-and-del-potro-will-face-novak-djokovic-in-sundays-final-credit-adam-stoltmanalamy-live-news-PJJW21.jpg)
New York, USA. 7th September 2018. US Open Tennis: Argentina's Juan Martin del Potro serving to Spain's Rafael Nadal, during their semifinal match at the US Open in Flushing Meadows, New York.
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Juan Martin del Potro, Other Top Tennis Players Find Success Behind Second Serves | ATP Tour | Tennis
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Roger Federer and Juan Martin del Potro go head-to-head to reach last four of ATP World Tour Finals | Tennis News | ESPN.co.uk
![Juan Martin Del Potro, or Delpo, of Argentina serves against Roger Federer of Switzerland in their semifinal of men's singles during the Shanghai Role Stock Photo - Alamy Juan Martin Del Potro, or Delpo, of Argentina serves against Roger Federer of Switzerland in their semifinal of men's singles during the Shanghai Role Stock Photo - Alamy](https://c8.alamy.com/comp/W7ER1A/juan-martin-del-potro-or-delpo-of-argentina-serves-against-roger-federer-of-switzerland-in-their-semifinal-of-mens-singles-during-the-shanghai-role-W7ER1A.jpg)
Juan Martin Del Potro, or Delpo, of Argentina serves against Roger Federer of Switzerland in their semifinal of men's singles during the Shanghai Role Stock Photo - Alamy
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