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WUHAN, CHINA - SEPTEMBER 24: Kiki Bertens of the Netherlands returns a shot during the match against Bernarda Pera of USA on Day 3 of 2019 Dongfeng Motor Wuhan Open at Optics Valley International Tennis Center on September 24, 2019 in Wuhan, China. (Photo by Wang He/Getty Images)

WUHAN, CHINA - SEPTEMBER 24:  Kiki Bertens of the Netherlands returns a shot during the match against Bernarda Pera of USA on Day 3 of 2019 Dongfeng Motor Wuhan Open at Optics Valley International Tennis Center on September 24, 2019 in Wuhan, China.  (Photo by Wang He/Getty Images)