TOPSHOT - Juan Martin del Potro of Argentina reacts to his victory over Roger Federer of Switzerland  during their 2017 US Open Mens Singles quarter finals match at the USTA Billie Jean King National Tennis Center in New York on September 6, 2017. / AFP PHOTO / DON EMMERT eeuu nueva york juan martin del potro tenis torneo abierto de eeuu tenis tenistas
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