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Spain's Rafael Nadal greets spectators before the singles semifinal match against Croatia's Marin Cilic at 2017 ATP Shanghai Masters tennis tournament in Shanghai, east China, on Oct. 14, 2017. (Xinhua/Fan Jun)

Spain's Rafael Nadal greets spectators before the singles semifinal match against Croatia's Marin Cilic at 2017 ATP Shanghai Masters tennis tournament in Shanghai, east China, on Oct. 14, 2017. (Xinhua/Fan Jun)