Stephane Houdet (L) of France and Shingo Kunieda of Japan pose with their throphies after the wheelchair men's singles final at the US Open tennis championships in New York, the United States, Sept. 8, 2013. Houdet won the match 2-0. (Xinhua/Fang Zhe)

Shingo Kunieda of Japan returns the ball during the wheelchair men's singles final against Stephane Houdet of France at the US Open tennis championships in New York, the United States, Sept. 8, 2013. Shingo Kunieda lost the match 0-2. (Xinhua/Fang Zhe)

Stephane Houdet of France returns the ball during the wheelchair men's singles final against Shingo Kunieda of Japan at the US Open tennis championships in New York, the United States, Sept. 8, 2013. Houdet won the match 2-0. (Xinhua/Fang Zhe)

Stephane Houdet of France returns the ball during the wheelchair men's singles final against Shingo Kunieda of Japan at the US Open tennis championships in New York, the United States, Sept. 8, 2013. Houdet won the match 2-0. (Xinhua/Fang Zhe)