Rafael Nadal of Spain serves to Andrey Kuznetsov of Russia during their match on the fifth day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 02 September 2016. The US Open runs through September 11. EPA/JASON SZENES
Rafael Nadal of Spain hits a return to Andrey Kuznetsov of Russia during their match on the fifth day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 02 September 2016. The US Open runs through September 11. EPA/JASON SZENES
Rafael Nadal of Spain hits a return to Andrey Kuznetsov of Russia during their match on the fifth day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 02 September 2016. The US Open runs through September 11. EPA/JASON SZENES
Rafael Nadal of Spain hits a return to Andrey Kuznetsov of Russia during their match on the fifth day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 02 September 2016. The US Open runs through September 11. EPA/JASON SZENES
Rafael Nadal of Spain reacts after defeating Andrey Kuznetsov of Russia on the fifth day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 02 September 2016. The US Open runs through September 11. EPA/BRIAN HIRSCHFELD
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