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Dutch Kiki Bertens reacts during the WTA Masters Tournament semifinal between Dutch Kiki Bertens and Britain's Johanna Konta at the Foro Italico camp in Rome, Italy on May 18, 2019. (Xinhua/Alberto Lingria)

Dutch Kiki Bertens reacts during the WTA Masters Tournament semifinal between Dutch Kiki Bertens and Britain's Johanna Konta at the Foro Italico camp in Rome, Italy on May 18, 2019. (Xinhua/Alberto Lingria)