![Switzerland's Roger Federer celebrates with the trophy after winning the final match against Argentina's Juan Martin del Potro at the Swiss Indoors tennis tournament in Basel, Switzerland, on Sunday, Oct. 29, 2017. ( Switzerland's Roger Federer celebrates with the trophy after winning the final match against Argentina's Juan Martin del Potro at the Swiss Indoors tennis tournament in Basel, Switzerland, on Sunday, Oct. 29, 2017. (](https://l450v.alamy.com/450v/2ny3h97/switzerlands-roger-federer-celebrates-with-the-trophy-after-winning-the-final-match-against-argentinas-juan-martin-del-potro-at-the-swiss-indoors-tennis-tournament-in-basel-switzerland-on-sunday-oct-29-2017-alexandra-weykeystone-via-ap-2ny3h97.jpg)
Switzerland's Roger Federer celebrates with the trophy after winning the final match against Argentina's Juan Martin del Potro at the Swiss Indoors tennis tournament in Basel, Switzerland, on Sunday, Oct. 29, 2017. (
![Argentina's Juan Martin del Potro returns a shot to Switzerland's Roger Federer during the final at the Swiss Indoors tennis tournament in Basel, Switzerland, on Sunday, Oct. 29, 2017. (Georgios Kefalas/Keystone via Argentina's Juan Martin del Potro returns a shot to Switzerland's Roger Federer during the final at the Swiss Indoors tennis tournament in Basel, Switzerland, on Sunday, Oct. 29, 2017. (Georgios Kefalas/Keystone via](https://c8.alamy.com/comp/2NY3HPP/argentinas-juan-martin-del-potro-returns-a-shot-to-switzerlands-roger-federer-during-the-final-at-the-swiss-indoors-tennis-tournament-in-basel-switzerland-on-sunday-oct-29-2017-georgios-kefalaskeystone-via-ap-2NY3HPP.jpg)
Argentina's Juan Martin del Potro returns a shot to Switzerland's Roger Federer during the final at the Swiss Indoors tennis tournament in Basel, Switzerland, on Sunday, Oct. 29, 2017. (Georgios Kefalas/Keystone via
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