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Katerina Siniakova of the Czech Republic hits a return to Ons Jabeur of Tunisia during their women's singels first round match at 2020 WTA Qatar Open tennis tournament in Doha, Qatar, Feb. 23, 2020. (Photo by Nikku/Xinhua)
Katerina Siniakova of the Czech Republic hits a return to Ons Jabeur of Tunisia during their women's singels first round match at 2020 WTA Qatar Open tennis tournament in Doha, Qatar, Feb. 23, 2020. (Photo by Nikku/Xinhua)