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BEIJING, CHINA - OCTOBER 06: Rafael Nadal of Spain celebrates winning his semifinal match against Wu Di of China during the Men's singles first round match on day four of the 2015 China Open at the China National Tennis Centre on October 6, 2015 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 06:  Rafael Nadal of Spain celebrates winning his semifinal match against Wu Di of China during the Men's singles first round match on day four of the 2015 China Open at the China National Tennis Centre on October 6, 2015 in Beijing, China.  (Photo by Lintao Zhang/Getty Images)