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Jelena Jankovic of Serbia celebrates her win over Denisa Allertova of the Czech Republic during the women's singles final at the Guangzhou Open tennis championship in Guangzhou, southern China's Guangdong province on September 26, 2015. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)

Jelena Jankovic of Serbia celebrates her win over Denisa Allertova of the Czech Republic during the women's singles final at the Guangzhou Open tennis championship in Guangzhou, southern China's Guangdong province on September 26, 2015. CHINA OUT    AFP PHOTO        (Photo credit should read STR/AFP/Getty Images)