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BEIJING, CHINA - OCTOBER 08: Rafael Nadal of Spian and Pablo Carreno Busta of Spain return a shot against Mike Bryan of the United States and Bob Bryan of the United States during the Men's Double Semi Final match on day eight of the 2016 China Open at the China National Tennis Centre on October 8, 2016 in Beijing, China. (Photo by Etienne Oliveau/Getty Images)

BEIJING, CHINA - OCTOBER 08:  Rafael Nadal of Spian and Pablo Carreno Busta of Spain return a shot against Mike Bryan of the United States and Bob Bryan of the United States during the Men's Double Semi Final match on day eight of the 2016 China Open at the China National Tennis Centre on October 8, 2016 in Beijing, China.  (Photo by Etienne Oliveau/Getty Images)