Serbia's Novak Djokovic returns the ball during the men's singles final against Andy Murray of Britain at the 2016 ATP World Tour Finals at the O2 Arena in London, Britain on Nov. 20, 2016. Djokovic lost 0-2. (Xinhua/Han Yan)
Serbia's Novak Djokovic returns the ball during the men's singles final against Andy Murray of Britain at the 2016 ATP World Tour Finals at the O2 Arena in London, Britain on Nov. 20, 2016. Djokovic lost 0-2. (Xinhua/Han Yan)
![]() |