Rafael Nadal of Spain returns the ball during the men's singles quarterfinal match against Stanislas Wawrinka of Switzerland at the Shanghai Masters tennis tournament in Shanghai, east China, Oct. 11, 2013. Nadal won the match 2-0. (Xinhua/Ding Ting)
Stanislas Wawrinka of Switzerland returns the ball during the men's singles quarterfinal match against Rafael Nadal of Spain at the Shanghai Masters tennis tournament in Shanghai, east China, Oct. 11, 2013. Nadal won the match 2-0. (Xinhua/Ding Ting)
Stanislas Wawrinka of Switzerland returns the ball during the men's singles quarterfinal match against Rafael Nadal of Spain at the Shanghai Masters tennis tournament in Shanghai, east China, Oct. 11, 2013. Nadal won the match 2-0. (Xinhua/Ding Ting)
Rafael Nadal of Spain returns the ball during the men's singles quarterfinal match against Stanislas Wawrinka of Switzerland at the Shanghai Masters tennis tournament in Shanghai, east China, Oct. 11, 2013. Nadal won the match 2-0. (Xinhua/Ding Ting)
Rafael Nadal of Spain returns the ball during the men's singles quarterfinal match against Stanislas Wawrinka of Switzerland at the Shanghai Masters tennis tournament in Shanghai, east China, Oct. 11, 2013. Nadal won the match 2-0. (Xinhua/Ding Ting)
