Novak Djokovic (SRB) serves during his match against Philipp Kohlschreiber (GER) on day eight of the 2014 US Open tennis tournament at USTA Billie Jean King National Tennis Center, September 1, 2014. It was the eighth straight year for the Serb to make into US Open last eight. Djokovic was to face the eighth seed Andy Murray in the quarterfinal.[Photo/Agencies] |