Serbia's Novak Djokovic returns a shot during the men's singles third round match against Grigor Dimitrov of Bulgaria at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Djokovic won 3-0. (Xinhua/Gao Jing)
Serbia's Novak Djokovic returns a shot during the men's singles third round match against Grigor Dimitrov of Bulgaria at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Djokovic won 3-0. (Xinhua/Gao Jing)
Grigor Dimitrov of Bulgaria returns a shot during the men's singles third round match against Serbia's Novak Djokovic at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Djokovic won 3-0. (Xinhua/Gao Jing)
Grigor Dimitrov of Bulgaria returns a shot during the men's singles third round match against Serbia's Novak Djokovic at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Djokovic won 3-0. (Xinhua/Gao Jing)
Grigor Dimitrov of Bulgaria returns a shot during the men's singles third round match against Serbia's Novak Djokovic at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Djokovic won 3-0. (Xinhua/Gao Jing)
Serbia's Novak Djokovic returns a shot during the men's singles third round match against Grigor Dimitrov of Bulgaria at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Djokovic won 3-0. (Xinhua/Gao Jing)
Serbia's Novak Djokovic returns a shot during the men's singles third round match against Grigor Dimitrov of Bulgaria at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Djokovic won 3-0. (Xinhua/Gao Jing)