epa07008986 Novak Djokovic of Serbia hits a return to Juan Martin del Potro of Argentina during the men's final on the fourteenth day of the US Open Tennis Championships the USTA National Tennis Center in Flushing Meadows, New York, USA, 09 September 2018. The US Open runs from 27 August through 09 September. EPA-EFE/JUSTIN LANE
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