Serbia's Novak Djokovic stays on the hunt for an Olympic Games medal after taking down Dominik Koepfer in the third round.
Novak Djokovic of Serbia continues his quest for an Olympic Games gold medal, eliminating Dominik Koepfer of Germany in the third round of tennis men's singles, 7-5, 6-3.
Djokovic, a Beijing 2008 bronze medalist, will next face Greece's Stefanos Tsitsipas in the quarterfinals.