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Tomas Berdych of Czech Republic celebrates after the singles quarterfinal match against Pierre-Hugues Herbert of France at the ATP Qatar Open tennis tournament in Doha, capital of Qatar, Jan. 3, 2019. (Xinhua/ Nikku)

Tomas Berdych of Czech Republic celebrates after the singles quarterfinal match against Pierre-Hugues Herbert of France at the ATP Qatar Open tennis tournament in Doha, capital of Qatar, Jan. 3, 2019. (Xinhua/ Nikku)