Novak Djokovic of Serbia returns a shot to Marcel Granollers of Spain during the men's singles fourth round match at the 2013 US Open tennis championships in New York, the United States, on Sept. 3, 2013. Djokovic won the match 3-0. (Xinhua/Wang Lei)
Novak Djokovic of Serbia returns a shot to Marcel Granollers of Spain during the men's singles fourth round match at the 2013 US Open tennis championships in New York, the United States, on Sept. 3, 2013. Djokovic won the match 3-0. (Xinhua/Wang Lei)
Novak Djokovic of Serbia returns a shot to Marcel Granollers of Spain during the men's singles fourth round match at the 2013 US Open tennis championships in New York, the United States, on Sept. 3, 2013. Djokovic won the match 3-0. (Xinhua/Wang Lei)
Novak Djokovic of Serbia returns a shot to Marcel Granollers of Spain during the men's singles fourth round match at the 2013 US Open tennis championships in New York, the United States, on Sept. 3, 2013. Djokovic won the match 3-0. (Xinhua/Wang Lei)
Novak Djokovic of Serbia returns a shot to Marcel Granollers of Spain during the men's singles fourth round match at the 2013 US Open tennis championships in New York, the United States, on Sept. 3, 2013. Djokovic won the match 3-0. (Xinhua/Wang Lei)
Novak Djokovic of Serbia jubilates during the men's singles fourth round match against Marcel Granollers of Spain at the 2013 US Open tennis championships in New York, the United States, on Sept. 3, 2013. Djokovic won the match 3-0. (Xinhua/Wang Lei)
Novak Djokovic of Serbia returns a shot to Marcel Granollers of Spain during the men's singles fourth round match at the 2013 US Open tennis championships in New York, the United States, on Sept. 3, 2013. Djokovic won the match 3-0. (Xinhua/Wang Lei)
Novak Djokovic of Serbia returns a shot to Marcel Granollers of Spain during the men's singles fourth round match at the 2013 US Open tennis championships in New York, the United States, on Sept. 3, 2013. Djokovic won the match 3-0. (Xinhua/Wang Lei)
