WIMBLEDON, June 27, 2016 (Xinhua) -- Novak Djokovic of Serbia returns the ball against James Ward of Great Britain during the men's single first round match at the 2016 Wimbledon Championships in Wimbledon, southwest London, Britain, June 27, 2016. Novak Djokovic won 3-0. (Xinhua/Ye Pingfan)