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CHENGDU, CHINA - SEPTEMBER 27: Thiago Monteiro of Brazil returns a shot during the match against Yuichi Sugita of Japan during Day 3 of 2017 ATP Chengdu Open at Sichuan International Tennis Center on September 27, 2017 in Chengdu, China. (Photo by Zhong Zhi/Getty Images)

CHENGDU, CHINA - SEPTEMBER 27: Thiago Monteiro of Brazil returns a shot during the match against Yuichi Sugita of Japan during Day 3 of 2017 ATP Chengdu Open at Sichuan International Tennis Center on September 27, 2017 in Chengdu, China. (Photo by Zhong Zhi/Getty Images)