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WTA Finals: US Open champion Naomi Osaka loses again, this time to Wimbledon winner Angelique Kerber | The Straits Times
US Open Tennis Championships - The WTA Finals Singapore groups have been drawn! Red Group: Kerber, Osaka, Stephens, Bertens. White Group: Wozniacki, Kvitova, Svitolina, Pliskova. #WTAFinals #USOpen | Facebook
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