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SHENZHEN, CHINA - OCTOBER 28: Karolina Pliskova of the Czech Republic plays a forehand against Elina Svitolina of Ukraine during their Women's Singles match on Day Two of the 2019 Shiseido WTA Finals at Shenzhen Bay Sports Center on October 28, 2019 in Shenzhen, China. (Photo by Lintao Zhang/Getty Images)

SHENZHEN, CHINA - OCTOBER 28: Karolina Pliskova of the Czech Republic plays a forehand against Elina Svitolina of Ukraine during their Women's Singles match on Day Two of the 2019 Shiseido WTA Finals at Shenzhen Bay Sports Center on October 28, 2019 in Shenzhen, China. (Photo by Lintao Zhang/Getty Images)